AOD Display Driver Control for Faster Screen-Off Switching
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Solution Overview
Problem
Existing electronic devices experience a significant delay in transitioning to the always on display (AOD) mode after screen-off due to the time-consuming power-off and power-on procedures of the display screen, leading to slow AOD implementation.
Innovation Solution
The method involves omitting power-off and power-on procedures of the display screen by intercepting the power-off instruction and keeping the IC chip in a power-on state, allowing the display driver to directly display the AOD pattern upon receiving the AOD instruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the display screen performs complete power-off and power-on procedures when transitioning to AOD mode, then the display screen can be fully turned off to save power, but the transition time to AOD mode becomes excessively long
Solution Approach 1:
The display driver intercepts the power-off instruction before it reaches the display screen, preventing the power-off action from occurring. This preliminary intervention allows the AOD mode to be activated without waiting for the power-off and subsequent power-on procedures to complete, thereby reducing the transition time while maintaining the ability to control power consumption through selective pixel rendering
Solution Approach 2:
The patent extracts the power-off action from the AOD activation process by intercepting the power-off instruction at the display driver level. This separation allows the system to enter AOD mode without actually powering off the display screen, eliminating the time-consuming power-off and power-on sequence while still achieving the visual effect of a turned-off screen through selective pixel control
2Speed
If the display screen remains in power-on state to enable fast AOD switching, then the transition speed improves, but power consumption increases compared to complete power-off
Solution Approach 1:
The display driver controls individual pixels or regions of the display screen to be rendered in black or inactive states while the overall display screen remains in power-on state. This local quality approach allows the system to achieve the visual appearance of a powered-off screen for power saving, while maintaining the electrical connection and readiness for rapid AOD activation without complete power cycling
Solution Approach 2:
By intercepting the power-off instruction before execution, the system preliminarily prevents the power-off action from occurring. This allows the display screen to remain in a ready state with reduced power consumption through selective pixel control, rather than undergoing complete power-off and power-on cycles, thus achieving both fast activation and power efficiency
Data Source
AI summary
This application provides an always on display control method, an electronic device, and a storage medium, and relates to the field of display technologies. When a screen-off trigger condition is met, a display driver receives a backlight instruction and a power-off instruction, the display driver controls, in response to the backlight instruction, to turn off backlight of a display screen, and the display driver intercepts the power-off instruction, and does not control the display screen to power off. In this case, an IC chip of the display screen is not triggered to power off. Then, when the display driver receives an AOD display instruction, because the IC chip of the display screen is in a power-on state, it is unnecessary to trigger the IC chip of the display screen to power on. Therefore, the display driver can more quickly trigger the display screen to display an always on pattern.