Display Device Screen Saver Luminance Control
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Solution Overview
Problem
Modern display devices face challenges in minimizing power consumption and extending the lifespan of organic light emitting diode (OLED) displays while reducing the burn-in phenomenon and making screen saver operations less noticeable to users.
Innovation Solution
A display device and method that adjust luminance based on the distance between display areas during screen saver operations, using a timing controller with frame memories, load summation units, and a gain determination unit to calculate luminance values, ensuring a gradual reduction in luminance over time and subtle changes in display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If luminance is reduced during screen saver operation to minimize power consumption, then power consumption is reduced, but the luminance change becomes noticeable to users
Solution Approach 1:
The patent applies local quality by adjusting luminance differently based on the distance between display areas. Areas that are closer together experience smaller luminance reductions, while areas farther apart can have larger luminance reductions. This spatially varying approach to luminance control allows the system to reduce overall power consumption while maintaining visual smoothness in regions where users are more likely to notice changes.
Solution Approach 2:
The patent implements dynamics by making luminance adjustment adaptive rather than static. The luminance reduction is dynamically calculated based on the distance between display areas, allowing the system to optimize power consumption in real-time while adapting to the spatial characteristics of the display content. This dynamic approach ensures that luminance changes remain imperceptible to users.
2Duration of action of stationary object
If luminance is reduced during screen saver operation to extend OLED lifespan, then OLED lifespan is prolonged, but the luminance change becomes noticeable to users
Solution Approach 1:
The patent applies local quality by implementing spatially varying luminance reduction during screen saver operation. By calculating the distance between display areas and applying different luminance reduction levels accordingly, the system can effectively reduce overall OLED stress and extend lifespan while maintaining visual smoothness in regions where users are more sensitive to luminance changes.
Solution Approach 2:
The patent implements dynamics by making the luminance adjustment during screen saver operation adaptive based on spatial relationships. The system dynamically calculates appropriate luminance levels for different display areas based on their distances, allowing for effective OLED protection while keeping luminance changes imperceptible to users.
3Use of energy by moving object
If uniform luminance reduction is applied during screen saver operation, then power consumption is reduced, but the luminance change is noticeable to users
Solution Approach 1:
The patent applies local quality by replacing uniform luminance reduction with spatially varying luminance adjustment. The system calculates the distance between display areas and applies different luminance reduction levels locally, which reduces power consumption while making luminance changes imperceptible to users by adapting to the spatial characteristics of each display region.
4Ease of operation
If distance-based luminance adjustment is implemented during screen saver operation, then user experience is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the display into multiple areas and calculating luminance adjustments for each area based on its distance from other areas. The timing controller processes display data in segments, applying distance-based luminance modulation to each segment independently. This segmented approach enables sophisticated luminance control that enhances user experience while managing computational complexity through modular processing.
Data Source
AI summary
A display device includes a display panel, a display driver, and a timing controller. The data driver may apply a first data voltage set and subsequently a second data voltage set to the display panel during a screen saver operation of the display device. The first data voltage set may cause the display panel to display a first illuminated area. The second data voltage set may cause the display panel to display a second illuminated area. The timing controller may supply image data to the data driver for the second data voltage set to cause the second illuminated area to have a luminance level. The timing controller may determine a value for controlling the luminance level based on a distance between a position of the first illuminated area and a position of the second illuminated area.