Foveated Display Bandwidth Reduction via Local Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Head-mounted displays (HMDs) and other displays face challenges in managing increasing size and power consumption, leading to bandwidth and energy inefficiencies, particularly in systems where available bandwidth is limited.
Innovation Solution
Implementing a system with parallel processors and graphics processing units (GPUs) that enable efficient graphics processing and display management, including techniques like foveated rendering, where the display is divided into regions of varying resolution and quality, with lower resolution in non-focused areas to conserve bandwidth and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If display size is increased, then display area is improved, but power consumption and bandwidth requirements increase
Solution Approach 1:
The patent applies local quality by dividing the display into different resolution zones: a high-resolution foveal region corresponding to the user's central vision and peripheral regions with lower resolution. This allows the display to provide high visual quality where needed while reducing overall bandwidth and power consumption by using lower resolution in less critical areas.
2Area of stationary object
If display size is increased, then display area is improved, but bandwidth requirements increase
Solution Approach 1:
The patent implements local quality by transmitting high-resolution data only for the foveal region and lower-resolution data for peripheral regions. This selective approach reduces the total quantity of data that must be transmitted over the display bandwidth, allowing larger display areas to be supported without proportionally increasing bandwidth requirements.
Solution Approach 2:
The patent segments the display content into multiple resolution layers: a high-resolution foveal layer and lower-resolution peripheral layers. This segmentation allows the system to manage bandwidth by transmitting only the necessary amount of data for each region, rather than transmitting full-resolution data for the entire display area.
3Measurement precision
If resolution is increased across the entire display, then image quality is improved, but bandwidth and power consumption increase
Solution Approach 1:
The patent applies local quality by providing high measurement precision (image quality) only in the foveal region where the user's vision is most acute, while using lower precision in peripheral regions. This matches the resolution quality to the visual importance of different display areas, maintaining overall image quality perception while reducing total power consumption.
4Measurement precision
If resolution is increased across the entire display, then image quality is improved, but bandwidth requirements increase
Solution Approach 1:
The patent implements local quality by transmitting high-precision image data only for the foveal region and lower-precision data for peripheral regions. This reduces the total quantity of data transmitted over the bandwidth while maintaining perceived image quality, as the high-resolution content is delivered only where the user's vision can fully appreciate it.
Solution Approach 2:
The patent segments the image quality transmission into multiple precision levels: high-resolution data for the foveal region and lower-resolution data for peripheral regions. This segmentation optimizes bandwidth utilization by transmitting only the necessary amount of high-precision data, rather than transmitting full-resolution data across the entire display area.
Data Source
AI summary
A system for reducing bandwidth and/or reducing power consumed by a display may comprise a display having a background plane and a region of interest plane that may be identified by a gaze tracker. The region of interest may be of a higher quality picture. In some embodiments, the display may be a large panel display and in others a head mounted display (HMD).