Self-Refresh Control Method for Display Systems
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Solution Overview
Problem
In display systems operating in panel self-refresh mode, the asynchronous timing of updating and displaying frames can lead to frame tearing, degrading user experience due to power consumption considerations.
Innovation Solution
A self-refresh control method that adjusts the reading timing sequence signal based on the writing timing sequence signal, using a sink device with modules for selecting, receiving, storing, and generating timing signals to synchronize the display of self-refresh frames, thereby preventing frame tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the display system operates in panel self-refresh mode to reduce power consumption, then power consumption is reduced, but frame tearing occurs due to asynchronous timing between frame update and display
Solution Approach 1:
The patent implements dynamic timing adjustment by monitoring the timing relationship between frame writing and reading operations. When a timing conflict is detected (writing and reading occurring simultaneously), the system dynamically adjusts the reading timing to occur after writing is complete. This dynamic adaptation allows the system to maintain self-refresh mode for power savings while preventing frame tearing through real-time timing synchronization.
Solution Approach 2:
The patent employs a feedback mechanism where the system continuously monitors the timing status of frame writing and reading operations. A timing status detection module detects whether writing and reading are occurring at the same time, and based on this feedback, a timing adjustment module modifies the reading timing sequence signal to eliminate conflicts. This closed-loop feedback ensures frame display quality is maintained while preserving power consumption benefits.
2Reliability
If the frame update timing is changed to synchronize with display timing, then frame tearing is prevented, but the simplicity of self-refresh mode is reduced
Solution Approach 1:
The patent introduces a timing adjustment module as an intermediary component that sits between the frame writing operation and the frame reading operation. This module receives the reading timing sequence signal, adjusts it based on detected timing conflicts, and outputs the corrected timing signal. By using this intermediary, the system maintains the overall simplicity of self-refresh mode while adding only the necessary complexity to prevent frame tearing.
Data Source
AI summary
A self-refresh control method for a display system includes receiving a frame from a video source of the display system; storing the frame in a storage module of the display system according to a writing timing sequence signal; accessing data stored in the storage module as a self-refresh frame according to a reading timing sequence, for outputting the self-refresh frame to a display device of the display system; and adjusting the reading timing sequence signal according to the writing timing sequence signal and the reading timing sequence signal.