Adaptive Display Compression by Light Level
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Solution Overview
Problem
Current display technologies, particularly in virtual and augmented reality, face challenges in reducing the amount of data needed to be sent for display, especially in scenarios where dynamic range, color range, and frame rate are high, leading to increased data transmission requirements.
Innovation Solution
A method that monitors and analyzes light affecting the viewer's eye, adjusts display data parameters such as luminance, color depth, and resolution based on predetermined thresholds, and compresses the data before transmission to optimize data volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If display data is transmitted with high dynamic range, color range, and frame rate to match human eye performance, then image quality and visual experience are improved, but data transmission volume increases significantly
Solution Approach 1:
The patent dynamically changes display data parameters (resolution, color depth, frame rate, bit depth) based on monitored light levels and human visual system characteristics. Under low light conditions, parameters such as resolution and color depth are reduced, while maintaining high parameters under bright conditions, thereby adapting data transmission to actual visual perception needs and reducing unnecessary data transmission volume
Solution Approach 2:
The system dynamically adjusts display data parameters in real-time based on ambient light monitoring and viewer distance estimation. The parameters are not fixed but change continuously according to environmental conditions and HVS model predictions, optimizing the balance between image quality and data transmission efficiency
2Ease of operation
If wireless transmission is used to eliminate physical connections, then device portability and ease of use are improved, but data transmission bandwidth requirements increase the complexity of the system
Solution Approach 1:
By dynamically adjusting display data parameters based on light levels and HVS characteristics, the patent reduces the bandwidth required for wireless transmission. This parameter adaptation allows wireless transmission to maintain high image quality when needed while reducing data rates when visual details are less critical, thereby managing transmission system complexity
3Productivity
If display data is compressed to reduce transmission volume, then data transmission efficiency is improved, but image quality may deteriorate
Solution Approach 1:
The patent applies compression strategies that adapt to light levels and HVS characteristics. Under low light conditions where human vision is less sensitive to certain details, more aggressive compression can be applied with minimal perceived quality loss. Under bright conditions, compression is reduced to maintain higher image quality, thus optimizing the trade-off between transmission efficiency and image quality
Solution Approach 2:
The HVS model acts as an intermediary that predicts which visual details are perceptible under given light conditions. This intermediary guides the compression process by identifying which data can be reduced or removed without affecting perceived image quality, enabling efficient compression while maintaining visual fidelity
4Manufacturing precision
If high frame rates and resolution are maintained to match human visual acuity, then visual experience is improved, but power consumption increases
Solution Approach 1:
The patent dynamically changes frame rate and resolution parameters based on ambient light levels and HVS predictions. Under low light conditions where human visual acuity is reduced, the system lowers frame rate and resolution parameters, significantly reducing power consumption while maintaining acceptable visual experience. Under bright conditions, full parameters are restored to match human visual capabilities
Data Source
AI summary
A method for adapting display data forming an image for display on a display screen to a viewer involves monitoring, over time, light that may affect an eye of the viewer of the image, analysing (S82) information regarding the monitored light based on one or more predetermined parameters (which may be based on a predetermined model of reactions of a human eye to light or to changes in light), adjusting (S83) at least one display value (preferably not a luminance value) of at least some of the display data based on the analysis of the monitored light, compressing the adjusted display data, and sending (S84) it for display on the display screen. In one embodiment, the one or more predetermined parameters includes one or more colour thresholds and monitoring the light comprises monitoring relative levels of different colours in the monitored light.