Screen Saver Controller Optimizing Display Power and Lifespan
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Solution Overview
Problem
Conventional display devices operate screen saver mode without considering load and gray level, limiting power consumption reduction and display panel lifespan extension.
Innovation Solution
A screen saver controller that calculates load and maximum gray level data to determine gain reduction start time, slope, and minimum luminance gain, generating screen saver data to adjust display panel luminance based on input image data, optimizing power consumption and afterimage recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If screen saver mode operates without considering load and gray level, then the operation is simple, but power consumption cannot be minimized and display panel lifespan is reduced
Solution Approach 1:
The screen saver controller performs preliminary calculations of load and maximum gray level from the input image data before entering screen saver mode. This allows the system to pre-determine optimal gain reduction parameters, ensuring minimal power consumption while avoiding complex real-time adjustments during screen saver operation.
Solution Approach 2:
The controller dynamically changes operating parameters (gain reduction start time, slope, and minimum luminance gain) based on calculated load and gray level characteristics. By adjusting these parameters according to image content, the system minimizes power consumption without requiring complex hardware modifications.
2Duration of action of stationary object
If screen saver mode reduces luminance without optimization, then power consumption is reduced, but display panel lifespan is not maximized and afterimage recognition is poor
Solution Approach 1:
The controller optimizes luminance reduction by dynamically adjusting gain parameters based on image load and maximum gray level. This ensures the display panel operates at optimal luminance levels that extend lifespan while maintaining sufficient visual recognition of afterimages for screen saver functionality.
Solution Approach 2:
The system uses calculated load and gray level data to feedback-adjust screen saver parameters. This closed-loop approach ensures luminance reduction is optimized for both panel lifespan extension and afterimage visibility, preventing excessive dimming that would harm the panel or reduce too early that would waste power.
3Use of energy by moving object
If gain reduction starts later in screen saver mode, then power consumption is higher, but visual recognition of afterimage is improved
Solution Approach 1:
The controller calculates optimal gain reduction start time based on image load and maximum gray level characteristics. This dynamic parameter adjustment ensures gain reduction begins at the precise moment that balances power consumption with afterimage visual recognition requirements.
Solution Approach 2:
The screen saver operation transitions from static to dynamic parameter adjustment. The gain reduction timing and slope are dynamically determined based on real image content analysis, allowing the system to optimize both power consumption and afterimage recognition for each specific image.
Data Source
AI summary
A screen saver controller including a load calculator configured to generate load data of an image represented by input image data, a maximum gray level calculator configured to generate maximum gray level data of the image represented by the input image data, and a screen saver data generator configured to determine a gain of a screen saver mode based on the load data and the maximum gray level data when the screen saver mode is operated and to generate screen saver data based on the input image data and the gain.