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HDMI circuit and device circuit

A circuit and equipment technology, applied in the field of multimedia equipment, can solve problems such as damaged equipment, data transmission failure, abnormal equipment operation, etc., to achieve the effects of protecting equipment, ensuring successful transmission, and improving stability

Pending Publication Date: 2021-12-03
SHENZHEN FENDA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a power supply capable of transmitting current to the HDMI interface is installed in the device receiving data, it is easy for the current to flow back to the device sending data along the HDMI interface, and then the device works abnormally due to the current backflow, resulting in data transmission failure or even damage to the device

Method used

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  • HDMI circuit and device circuit
  • HDMI circuit and device circuit

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Embodiment Construction

[0018] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0019] see figure 1 , figure 1 It is a circuit diagram of an embodiment of the HDMI circuit of the present invention, combined with figure 1 The device circuit of the present invention will be described in detail.

[0020] In this embodiment, the HDMI circuit includes: a first power supply, an anti-backflow circuit, and an HDMI output interface, the input end of the anti-backflow circuit is connected to the first power supply, the output end is connected to the HDMI output interface, and the first power supply is connected to the HDMI output port through the anti-backflow circuit. The HDMI interface supplies power; the anti-backflow circuit includes...

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Abstract

The invention provides an HDMI circuit and an equipment circuit. The HDMI circuit comprises a first power supply, an anti-backflow circuit and an HDMI output interface; the input end of the anti-backflow circuit is connected with the first power supply, the output end of the anti-backflow circuit is connected with the HDMI output interface, and the first power supply supplies power to the HDMI interface through the anti-backflow circuit; the anti-backflow circuit comprises a first diode and a first resistor, the anode of the first diode is connected with the output end of the first power supply, one end of the first resistor is connected with the cathode of the first diode and the HDMI interface, and the other end of the first resistor is grounded. According to the invention, the influence of current backflow on equipment is prevented through the first diode, the equipment is protected, the successful transmission of data is ensured, the influence of conduction and cut-off of the first diode on the output voltage is eliminated through the first resistor, the stability of the output voltage is improved, and the authentication requirement of HDMI is met.

Description

technical field [0001] The present invention relates to the field of multimedia devices, in particular to an HDMI circuit and a device circuit. Background technique [0002] With the advent of the high-definition digital era, the HDMI interface (high-resolution multimedia digital transmission interface) is used as a transmission interface for audio and video signals. It only needs to use one cable when transmitting audio and video signals, thus greatly simplifying the installation of the system. , so the HDMI interface is widely used in TVs, DVDs, computers and other products. [0003] In the prior art, although a device using an HDMI interface transmits data to other devices through the HDMI interface, there is no current backflow problem because it has voltage itself. However, when a power supply capable of transmitting current to the HDMI interface is installed in the device receiving data, it is easy for the current to flow back to the device sending data along the HDMI...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/765
CPCH04N5/765
Inventor 王忠恺王玉华梁永治
Owner SHENZHEN FENDA TECH CO LTD
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