Always-On Display Control by Intercepting Screen Power-Off
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Solution Overview
Problem
Existing always on display (AOD) technologies experience significant delays in transitioning from screen-off to displaying the AOD pattern due to power-off and power-on procedures of the display screen, leading to excessive time consumption.
Innovation Solution
The method omits power-off and power-on procedures of the display screen by intercepting power-off instructions and maintaining the integrated circuit chip in a power-on state, allowing direct display of the AOD pattern upon receiving the AOD display instruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display screen performs complete power-off and power-on procedures when transitioning to always on display, then the display can be fully reset and stabilized, but the transition time becomes excessively long
Solution Approach 1:
The display driver intercepts the power-off instruction before it is executed, preventing the actual power-off from occurring. This preliminary action keeps the display in a power-on state with backlight off, allowing the AOD pattern to be displayed immediately without waiting for power-off and subsequent power-on procedures to complete.
2Speed
If the display screen maintains power-on state during screen-off, then the AOD can be initiated quickly, but power consumption increases
Solution Approach 1:
The solution applies different states to different parts of the display system: the backlight is turned off to save power, while the integrated circuit chip remains in power-on state to enable quick AOD initiation. This local differentiation allows the display to achieve fast response without unnecessary power consumption from the backlight.
Data Source
Figure 1(a)~1(c)
Figure 2A
Figure 2B
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. According to the solutions of this application, in a process of starting AOD after screen-off is triggered, power-off and power-on procedures of the display screen are omitted. In this case, a time consumed by starting the AOD is greatly reduced. Therefore, after screen-off is triggered, starting the always on display becomes quicker, and user experience is improved.