A method for reducing power consumption of edp signal chain

Abstract

The invention provides a method for reducing the power consumption of the eDP signal link, which reduces the refresh rate and at the same time reduces the transmission power consumption of the eDP link, which can be applied to both the working state and the idle state of the panel. The present invention provides a method for reducing the power consumption of eDP signal links, which includes the following steps: the signal source sending end outputs effective image data, and the signal source receiving end receives effective image data; the pixel clock of the image data remains unchanged, and the image data is increased. The number of lines in the vertical vanishing area of ​​the data. When the transformed image data’s shadowing area starts to run, the signal source sending end outputs a dormancy command to the signal source receiving end; after the signal source receiving end receives the dormancy command, the signal source receives The main link between the end and the signal source sending end is closed; at the moment when the vanishing area of ​​the transformed image data is about to end, the signal source sending end sends a wake-up signal and a lock signal; the signal source receiving end turns on after receiving the wake-up signal main link.

Description

technical field [0001] The invention relates to the technical field of display screens. Specifically, the present invention relates to a method for reducing power consumption of an eDP signal link. Background technique [0002] With the development and update of display technology, the video transmission protocol is also constantly updated. The DP protocol (DisplayPort, a video signal transmission protocol formulated by VESA) of VESA (Video Electronics Standards Association) has gradually developed from version 1.1a to Version 1.4 so far. Among them, the video transmission bandwidth has gradually developed from 1.62Gbps / lane to the latest 8.1Gbps / lane. Manufacturers such as Dell have also begun mass production of 8K resolution commercial LCD monitors corresponding to DP1.48.1Gbps rate. For traditional notebook computers and emerging mobile phones and tablet markets with high resolution and high refresh rate, VESA has also specifically added the eDP1.4 protocol. The signal...

AI Technical Summary

Problems solved by technology

Some existing eDP devices use ALPM technology (Advanced Link Power Management) and PSR technology (Panel Self Refresh panel self-refresh), which can reduce link power consumption in idle state, but due to the limitation of PSR technology, for limited idle Application scenarios where the screen changes in the low power state and the application scenario in the low power working state require additional partial screen refresh technology, the effect of reducing power consumption is not good, and it increases the difficulty of design

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