Backlight Luminance Control for VR Display Aging Prevention
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Solution Overview
Problem
In virtual reality (VR) and augmented reality (AR) systems, the existing display technologies face challenges in maintaining high display quality and reducing power consumption, particularly due to light leakage in direct-lit backlight units, which affects the luminance of highlighted regions and can lead to premature aging of light-emitting devices.
Innovation Solution
An image display processing method that employs local dimming and peak driving technologies to adjust the luminance of backlight blocks based on regional eigenvalues, using a preset threshold to determine when peak driving processing is necessary, thereby optimizing backlight luminance and extending the service life of light-emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If peak driving processing is continuously applied to maintain high backlight luminance, then display quality is improved, but light-emitting devices age prematurely
Solution Approach 1:
The patent implements dynamic adjustment of backlight luminance by comparing regional eigenvalues between current and previous frames. The system transitions between peak driving mode (when content requires high luminance) and normal driving mode (when content is static or dark), optimizing both display quality and device longevity through adaptive control strategies
Solution Approach 2:
The system employs periodic frame comparison to determine when peak driving is necessary. By analyzing changes in regional eigenvalues between frames, the backlight controller activates peak driving only during periods when content changes require enhanced luminance, rather than maintaining continuous peak driving
2Illumination intensity
If local dimming is used to improve display contrast, then display quality is enhanced, but power consumption increases
Solution Approach 1:
The patent divides the backlight into multiple independent blocks that can be controlled separately. Each block's luminance is adjusted based on its specific regional eigenvalue requirements, allowing high contrast in regions needing it while maintaining lower luminance in other regions, thus improving overall display contrast while managing power consumption
Solution Approach 2:
The system dynamically changes backlight luminance parameters based on content analysis. By adjusting the luminance of individual backlight blocks according to the regional eigenvalues of displayed content, the system optimizes the balance between display contrast and power consumption
3Productivity
If backlight luminance is continuously adjusted to match content requirements, then display efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the backlight controller continuously monitors regional eigenvalues of displayed content and adjusts backlight luminance accordingly. The system uses the change in regional eigenvalues between frames as feedback to determine when to activate peak driving, creating a closed-loop control system that optimizes display efficiency
Solution Approach 2:
The system performs self-adjustment by automatically analyzing its own displayed content and making appropriate backlight luminance adjustments. The controller service determines when peak driving is needed based on content characteristics, eliminating the need for external intervention or complex manual control
Data Source
AI summary
An image display processing method for a display device, an image display processing device, a display device and a storage medium are provided. The display device includes a backlight unit, the backlight unit includes a plurality of backlight blocks and is driven by a local dimming mode, and the image display processing method includes: acquiring a regional eigenvalue of each backlight block of an (n)th frame image and a regional eigenvalue of each backlight block of an (n−1)th frame image; and performing a peak driving processing on a backlight luminance of each backlight block of the (n)th frame image, based on a preset threshold, the regional eigenvalue of each backlight block of the (n)th frame image and the regional eigenvalue of each backlight block of the (n−1)th frame image, so as to acquire an adjusted backlight luminance of each backlight block of the (n)th frame image.