Display Device Screensaver Activation Based on Image Load
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The constant time at which a display device enters screensaver mode, regardless of panel load, leads to reduced pixel lifetime, panel degradation, and increased power consumption.
Innovation Solution
A display device and driving method that adjust the screensaver activation time and gain value based on a histogram analysis of the input image's grayscale values and load, dynamically setting the set period and gain levels to optimize power usage and prevent afterimages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a constant time is used for screensaver activation regardless of panel load, then the control logic is simple, but pixel lifetime is reduced and power consumption increases
Solution Approach 1:
The screensaver activation time is made dynamic by adjusting it according to the load value of the displayed image. When the load value exceeds a reference threshold, the activation time is extended, allowing pixels to recover from high-stress states. This dynamic adjustment optimizes pixel lifetime without requiring complex additional hardware.
Solution Approach 2:
The patent changes the activation time parameter based on the load value parameter of the input image. By monitoring the load value and adjusting the activation time accordingly, the system resolves the contradiction between simple control logic and extended pixel lifetime through parameter adaptation.
2Device complexity
If a constant time is used for screensaver activation regardless of panel load, then the control logic is simple, but power consumption is increased
Solution Approach 1:
The screensaver activation time is dynamically adjusted based on the load value of the displayed image. When load is high, activation time increases to allow pixel recovery, reducing unnecessary power consumption from premature screensaver activation. This dynamic approach optimizes energy efficiency while maintaining simple control logic.
Solution Approach 2:
The system adapts the activation time parameter according to the load value parameter, enabling power consumption optimization through parameter changes rather than through complex control structures.
3Device complexity
If the gain value is not adjusted according to image content, then the screensaver function is simple, but afterimage prevention is insufficient
Solution Approach 1:
The gain value parameter is adjusted based on the load value parameter of the input image. When the load value exceeds the reference threshold, the gain value is set to a first value for stronger afterimage prevention. This parameter adaptation improves afterimage prevention effectiveness while keeping the screensaver function relatively simple.
Solution Approach 2:
The system applies different gain values based on the local condition of image load. By monitoring the load value and applying appropriate gain adjustments, the system provides localized quality control for afterimage prevention without requiring complex overall system changes.
Data Source
AI summary
A display device includes a set period setting unit for setting, as a set time, a time for which a set period elapses from a time at which a first area included in an input image is detected as a still area, and a gain generator for gradually decreasing an initial level of a gain value down to a saturation level having a lowest value of the gain value from the set time. The set period setting unit differently sets the saturation level of the gain value and a final level of the gain value, corresponding to grayscale values of the first area and a load value of the input image. The load value is an average value of grayscale values of an entirety of an area of the input image.