Display Driver Wake-Up Sequencing for Faster Screen-On
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Solution Overview
Problem
Existing electronic devices face long wake-up times and slow screen-on transitions when awakening the display screen from a dormant state.
Innovation Solution
A display control method that involves separately sending a start instruction and a preparation instruction to the display IC, allowing simultaneous performance of power-on, initialization, and image/backlight parameter processes, reducing the overall wake-up time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If sequential instructions are sent to the display IC for power-on and initialization, then the display screen can be awakened from dormant state, but the wake-up time is long and screen-on speed is slow
Solution Approach 1:
The patent segments the initialization process into two separate instructions: a start instruction that initiates power-on and initialization, and a preparation instruction that signals when initialization is complete. This segmentation allows the system to overlap the initialization process with subsequent operations, reducing the total wake-up time while maintaining proper sequencing of display activation tasks.
2Productivity
If multiple processes are performed sequentially during display power-on, then each process can be completed thoroughly, but the overall wake-up process takes too long
Solution Approach 1:
The patent implements preliminary action by sending the start instruction to initiate power-on and initialization processes before the display is fully ready. This allows initialization to begin in advance, and the system can prepare subsequent operations (such as sending image data and backlight parameters) while the display IC is still initializing, thereby overlapping processes and reducing total wake-up time.
Solution Approach 2:
The patent maintains continuity of useful action by ensuring that while the display IC is initializing, the system continuously prepares and queues subsequent necessary operations. The preparation instruction triggers the sending of image data and backlight parameters without waiting for initialization to complete, ensuring that once initialization finishes, the display can immediately display content without additional delays.
Data Source
AI summary
In a display control method, after a screen-on triggering condition is satisfied, a display screen is instructed to power on, a start instruction is sent to trigger initiation of the display screen, and a completion message is immediately returned to trigger processes such as sending an image and sending a backlight parameter. Then it is determined whether a duration for which the start instruction is sent satisfies a delay condition. If the delay condition is satisfied, a display driver sends a preparation instruction to the display screen to indicate that initialization is completed. If the delay condition is not satisfied, the display driver then sends the preparation instruction to the display screen after the delay condition is satisfied. Then the display screen is turned on based on the backlight parameter, and the display screen displays a lock screen interface, thereby waking up the display screen.