Zone-Based Display Data Processing for VR Bandwidth
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Solution Overview
Problem
Current display technologies face challenges in achieving high resolution, high frame rate, and low latency, particularly in applications like virtual reality (VR) and augmented reality (AR), due to bandwidth limitations at the display interface, which can lead to cybersickness and inefficiencies in data processing and transmission.
Innovation Solution
A system that divides the display into zones, using a processor with a graphics pipeline, tracking module, pre-processing module, and data transmitter to compress and transmit data efficiently, with the tracking module determining the gazing zone and the pre-processing module compressing data for non-gazing zones to reduce bandwidth, and the data transmitter sending compressed data at reduced frame rates for these zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution and high frame rate are implemented in VR/AR displays, then image quality and immersion are improved, but data bandwidth requirement increases beyond interface capabilities
Solution Approach 1:
The display is divided into multiple zones, with the gazing zone receiving full-resolution high-frame-rate data while peripheral zones receive lower-resolution data. This segmentation allows the system to prioritize bandwidth allocation to the most visually critical region, resolving the contradiction between high resolution and bandwidth limitations.
Solution Approach 2:
Different display quality parameters are applied to different spatial regions of the display. The gazing zone maintains high resolution and high frame rate, while peripheral zones use reduced resolution, creating a local quality differentiation that optimizes overall bandwidth usage while preserving user experience.
2Measurement precision
If full data transmission is used for all zones, then display quality is maintained, but power consumption increases
Solution Approach 1:
The display data transmission is segmented by zone, with the gazing zone receiving full-quality data and peripheral zones receiving compressed or lower-quality data. This segmentation reduces the total power consumption of the display system while maintaining perceived display quality in the critical gazing region.
Solution Approach 2:
The system applies different quality levels to different spatial zones based on user gaze information. By maintaining high quality only in the gazing zone and reducing quality in peripheral zones, the system optimizes power consumption while preserving user-perceived display quality.
3Quantity of substance
If data compression is applied to all zones, then bandwidth is reduced, but overall display quality deteriorates
Solution Approach 1:
Data compression is selectively applied only to peripheral zones while the gazing zone transmits uncompressed or lightly compressed data. This selective segmentation approach reduces overall bandwidth requirements while preserving display quality in the most visually important region.
Solution Approach 2:
The system implements differential compression strategies across different spatial zones, with the gazing zone maintaining high quality through minimal compression and peripheral zones accepting higher compression ratios. This local quality differentiation optimizes bandwidth efficiency while maintaining user experience.
4Speed
If high frame rate is maintained for all zones, then motion smoothness is improved, but data transmission latency increases
Solution Approach 1:
The frame rate is segmented by zone, with the gazing zone receiving high frame rate data and peripheral zones receiving lower frame rate data. This segmentation reduces the total data transmission volume and latency while maintaining motion smoothness in the critical gazing region where users focus their attention.
Solution Approach 2:
The system applies different frame rates to different spatial zones based on user gaze information. By maintaining high frame rates only in the gazing zone and reducing frame rates in peripheral zones, the system minimizes transmission latency while preserving motion smoothness where it matters most for user experience.
Data Source
AI summary
An apparatus includes a display panel and one or more drivers operatively coupled to the display panel. The display panel includes an array of pixels divided into at least a first zone and a second zone, each of which is associated with a plurality of display attributes. The drivers are configured to receive control signals, and drive the array of pixels based, at least in part, on the control signals so that a first value of at least one of the plurality of display attributes associated with the first zone is different from a second value of the at least one of the plurality of display attributes associated with the second zone.