Display Frame Frequency Restore for Faster Power-On
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Solution Overview
Problem
Existing display devices face challenges in efficiently managing variable refresh rates, leading to prolonged power-on times and inefficient power consumption due to the need for resetting frame frequencies upon power cycling.
Innovation Solution
A display device and method that utilizes a non-volatile memory to store frame frequency information, allowing for rapid power-on by synchronizing frame frequencies based on previously saved settings, thereby reducing the time required to set additional frame frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame frequency information is reset upon power cycling, then the display device ensures proper initialization, but the power-on time is prolonged due to the need to重新 set frame frequencies
Solution Approach 1:
The patent stores frame frequency information in non-volatile memory before power-off, so that the information is already prepared and available when power is restored. This preliminary action eliminates the need to重新 set frame frequencies during power-on initialization, thus reducing power-on time while ensuring proper initialization through the saved information.
2Device complexity
If frame frequency information is stored in volatile memory only, then the storage structure is simple, but the information is lost during power cycling requiring re-initialization
Solution Approach 1:
The patent implements preliminary storage of frame frequency information in non-volatile memory before power-off occurs. This ensures the information persists through power cycling, eliminating re-initialization time while maintaining a relatively simple memory structure that builds upon the existing volatile memory by adding non-volatile storage capability.
3Loss of time
If the display device saves and restores frame frequency information, then power-on time is reduced, but the memory management complexity increases
Solution Approach 1:
The system performs preliminary saving of frame frequency information to non-volatile memory before power-off, and preliminary loading of this information after power-on. This dual preliminary action approach reduces power-on time by having the data ready in advance, while the memory management complexity is handled through automated save/load operations that integrate with the existing power management framework.
Data Source
AI summary
A display device includes a host system configured to output an image signal and a control signal including information on a frame frequency, a timing controller configured to generate image data based on the image signal, generate a timing control signal in correspondence with the information on a frame frequency based on the control signal, and output the image data and the timing control signal, a memory part including a non-volatile memory and a volatile memory, and a micro-controller unit configured to control the memory part. The micro-controller unit can save information on a frame frequency of a current frame frequency in the non-volatile memory when a power-off signal is generated. The timing controller can set a frame frequency based on the information on the frame frequency saved in the non-volatile memory when a power-on signal is generated.