Always-on Display Algorithm Switching for OLED Burn-in Prevention
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Solution Overview
Problem
Current always on display (AOD) technologies using OLED displays in video mode, which lack RAM, are limited to 1-bit or 2-bit algorithms, resulting in poor adaptability to different clock styles and scenarios, leading to suboptimal display effects and potential screen burn-in due to static content.
Innovation Solution
Implementing a method that switches between 1-bit and 2-bit algorithm programs based on user-selected clock styles, allowing for adaptive display area adjustments and clock window movement to prevent static content stagnation, thereby enhancing display effectiveness and prolonging screen lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If OLED display in video mode without RAM is used for AOD, then power consumption is reduced and device complexity is lowered, but display adaptability to different clock styles deteriorates and display effect quality worsens
Solution Approach 1:
The patent implements dynamic algorithm switching between 1-bit and 2-bit refresh algorithms based on the selected clock style. The system dynamically adapts the display refresh approach: using 1-bit algorithm for single clock style to save power, and 2-bit algorithm for multi-clock style to improve display quality and adaptability, thereby resolving the contradiction between power consumption and display adaptability
Solution Approach 2:
The patent changes the bit depth parameter of the display refresh algorithm from fixed to variable. By switching between 1-bit and 2-bit algorithms based on clock style configuration, the system optimizes the balance between power consumption and display quality, enabling the same hardware to adapt to different display scenarios without additional RAM
2Device complexity
If single algorithm program is used for AOD, then device complexity is reduced, but adaptability to different clock styles deteriorates and display effect quality worsens
Solution Approach 1:
The patent implements multi-functionality by incorporating both 1-bit and 2-bit refresh algorithms within the same display driver. The system can universally handle different clock styles (single clock, dual clock, world clock) by selecting the appropriate algorithm, making the display system adaptable to various scenarios without requiring separate hardware configurations
Solution Approach 2:
The system dynamically selects between different algorithm programs based on the clock style setting. This dynamic switching capability allows the display to adapt to different scenarios (single clock vs. multi-clock styles) while maintaining manageable system complexity through automated selection rather than requiring manual configuration of multiple independent systems
3Loss of energy
If static content is displayed in AOD, then power consumption is reduced, but screen burn-in risk increases
Solution Approach 1:
The patent implements periodic refresh of the AOD content by moving clock windows to different positions at intervals. This periodic movement ensures that no single pixel location remains static for extended periods, preventing OLED burn-in while maintaining the low power consumption benefits of AOD mode. The system periodically changes the display content configuration without fully waking the screen
4Manufacturing precision
If 2-bit algorithm is used for single clock style, then display quality is improved, but display area is reduced
Solution Approach 1:
The patent applies local quality by using different algorithm bit depths in different clock style scenarios. For single clock style, the 2-bit algorithm provides higher display quality in the clock display area. For multi-clock styles, the system switches to 1-bit algorithm to expand the overall display area to accommodate multiple clock windows. This localized optimization of algorithm selection balances quality and area requirements for different display configurations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures optimal display effects by adapting to single or multi-clock styles, preventing screen burn-in and improving user experience through dynamic content placement and movement within the display area.
Implementation Method 1
Currently, organic light-emitting diode (organic light emitting devices, OLED) displays are used for an AOD function
Data Source
AI summary
A method includes running, in an always-on display state of the mobile device, a first algorithm program to display a first clock interface in a first display area of a display of the mobile device, receiving a switching instruction when the mobile device is switched from a first clock style to a second clock style, wherein the second clock interface is different from the first clock interface, performing switching from the first algorithm program to a second algorithm program in response to the switching instruction, and running, in the always-on display state, the second algorithm program to display the second clock interface in a second display area of the display, wherein a size of the second display area is different from a size of the first display area, and wherein the second algorithm program is different from the first algorithm program.