A device and method for converting dp image signal into lvds image signal

Abstract

The invention discloses a device and method for converting DP (Display Port) image signals into LVDS (Low-Voltage Differential Signaling) image signals. The method comprises following steps of 1), receiving DP auxiliary channel signals and DP image data signals; analyzing the DP auxiliary channel signals, thus obtaining DP data channel physical layer coding information; analyzing the DP image data signals, thus obtaining DP data channel quantity information; 2), carrying out physical layer decoding on the DP image data signals according to the DP data channel physical layer coding information, thus obtaining a DP image data packet; 3), converting the DP image data packet into RGB signals according to the DP data channel quantity information; 4), segmenting the RGS signals into multilink RGB signals according to an LVDS configuration instruction; and 5), converting the multilink RGB signals into multilink LVDS image signals. According to the method and the device, DP signal inputs of all specifications and standards can be supported; LVDS signal outputs of multilink transmission modes can be supported; and the electrical parameters of the output LVDS signals are not influenced by the DP signals.

Description

technical field [0001] The invention relates to the technical field of image signal processing, in particular to a device and method for converting a DP image signal into an LVDS image signal. Background technique [0002] DP interface (DisplayPort) is a new type of image display interface, it can not only support ordinary full HD display resolution (1920×1080), but also support 4k resolution (3840×2160), the latest standard even supports 8k resolution (7680×4320). The DP interface is not only high in transmission rate, but also reliable and stable. Its interface is composed of data channel signals for image transmission and auxiliary channel signals for image-related status and control information, and has gradually become the de facto next-generation display interface standard. [0003] However, due to various reasons such as production, technology, price, and consumer acceptance, the mainstream liquid crystal display modules on the market still stay on the interface stan...

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Problems solved by technology

Chinese utility model patent CN201420370436.5 discloses an EDP interface to LVDS interface card. The interface conversion card is based on an interface conversion chip capable of converting EDP signals into LVDS signals. Due to the limitation of the conversion chip, the interface conversion card cannot Supports all specifications and standard DP signal input, and the electrical parameters of the output LVDS signal are limited by the DP signal

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