OLED Display Lifespan Extension via Eye Tracking Brightness Control
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Solution Overview
Problem
High-brightness OLED displays have a relatively short lifespan due to luminance degradation from electrical current and heat exposure, leading to frequent replacements and increased costs, especially when used in applications requiring high brightness.
Innovation Solution
An eye tracking system coupled with a processor determines a foveal region of interest on the display and modifies the brightness profile and image portions outside this region, reducing brightness and altering non-foveal region images to extend the display's luminance degradation lifespan without compromising user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-brightness OLED displays are operated at high luminance levels, then display brightness performance is improved, but display lifespan deteriorates due to accelerated luminance degradation
Solution Approach 1:
The patent applies local quality by differentiating brightness levels across different spatial regions of the display. The foveal region (where the user's gaze is focused) maintains high brightness for optimal visual acuity, while peripheral regions operate at reduced brightness levels. This spatial differentiation allows the display to achieve high overall brightness performance while reducing the cumulative stress on individual pixels, thereby extending display lifespan.
Solution Approach 2:
The patent implements dynamics by continuously adapting display brightness based on real-time eye tracking data. The system dynamically adjusts which regions receive high brightness based on the user's current gaze position, creating a moving pattern of high-brightness zones that follows the foveal region. This dynamic adaptation ensures that no single region is constantly subjected to maximum stress, extending overall display life while maintaining perceived brightness quality.
2Reliability
If OLED displays are replaced frequently due to short lifespan, then display performance is maintained, but operational cost increases
Solution Approach 1:
The patent applies preliminary action by proactively reducing brightness in non-foveal regions before the display reaches its end-of-life. By anticipating that high-brightness operation accelerates degradation, the system preemptively lowers brightness levels in regions that are less critical for visual perception, thereby extending the operational lifespan and reducing replacement frequency while maintaining acceptable performance.
3Duration of action of stationary object
If brightness is reduced in non-foveal regions, then display lifespan is extended, but visual quality may deteriorate
Solution Approach 1:
The patent implements feedback by using eye tracking data to continuously monitor where the user is looking and adjusting display brightness accordingly. The system receives real-time feedback about foveal position and dynamically adjusts brightness levels to maintain high quality in the region of interest while reducing brightness elsewhere. This closed-loop control ensures visual quality is preserved where the user actually looks while achieving lifespan extension through selective brightness reduction.
Data Source
AI summary
A system may include a display, an eye tracking system, and a processor. The processor may be configured to receive eye tracking data. The processor may be further configured to determine a foveal region of interest of the display based on the eye tracking data. The processor may be further configured to perform a display modification operation configured to a) reduce a brightness profile for at least some of pixels outside of the foveal region of interest, wherein the reduced brightness profile is less than a foveal region brightness profile for foveal region pixels corresponding to the foveal region of interest, and/or b) modify a non-foveal region image portion. The processor may be further configured to generate image data indicative of the performed display modification operation. The processor may be further configured to output the image data to the display.