Power protection device based on dvi interface power supply

Abstract

The invention discloses a power supply protection device based on DVI interface power supply. The device comprises a power supply input end, a power supply output end, a voltage comparator connected with the power supply output end and a connection controller connected with the voltage comparator and connected between the power supply input end and the power supply output end. The voltage comparator compares voltage of the power supply output end with a preset voltage and outputs a control signal to the connection controller according to a comparison result. The connection controller receives the control signal and connects or disconnects the power supply input end and the power supply output end according to the control signal. The device is applied to a sending terminal and a receiving terminal, enables the sending terminal and the receiving terminal to supply power to external devices through DVI cables, and does not need other external power supplies.

Description

technical field [0001] The invention relates to DVI interface technology, in particular to a power protection device for power supply based on the DVI interface. Background technique [0002] As digital signals are more and more widely used in various industries in society, although high-definition digital interfaces such as HDMI and DP continue to emerge, DVI interfaces have always occupied a dominant position in many engineering sites due to their high connection reliability. The shortcoming of DVI signal transmission distance has always been the main reason why it cannot completely replace VGA transmission at the project site. Even if DVI is added with an equalizer, the maximum transmission distance can only be extended to 50 meters. However, with the continuous promotion and application of optical fiber, Ethernet and other transmission methods, more and more engineering sites use DVI to optical fiber, optical fiber to DVI, DVI to network, network to DVI and other methods...

AI Technical Summary

Problems solved by technology

The shortcoming of DVI signal transmission distance has always been the main reason why it cannot completely replace VGA transmission at the project site. Even if DVI is added with an equalizer, the maximum transmission distance can only be extended to 50 meters

The disadvantages of the existing power supply methods are as follows. On the one hand, the external power supply will increase the cost and it may not be possible to find a suitable power supply device at the receiving end, which will make it difficult to install the conversion module; on the other hand, the power supply of the traditional DVI interface is repeated. It is easy to cause damage to the conversion module when plugging and unplugging, which shortens the service life of the DVI interface

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