VR Display System Latency Reduction via Auxiliary View Region Segmentation
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Solution Overview
Problem
Conventional virtual reality display systems experience image quality degradation and increased latency due to the need for higher resolution, which is exacerbated by the transmission of full image data to all sub-pixels, including those not accurately focused by the user, leading to symptoms like motion sickness when latency exceeds 20 ms.
Innovation Solution
The system reduces latency by transmitting auxiliary image data only to sub-pixels in the auxiliary view region, which are not accurately focused by the user, using a content provider to classify and extract image data based on coordinate information and threshold pixel numbers, and duplicating and sorting this data for display on the display panel, thereby reducing the volume of image data processed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If resolution of the display panel is increased to overcome image quality degradation, then image quality is improved, but the volume of input image is increased leading to increased latency
Solution Approach 1:
The patent divides the display panel into a main view region and an auxiliary view region. The main view region receives full-resolution image data while the auxiliary view region receives down-sampled or lower-resolution image data. This segmentation allows different parts of the display to have different resolution requirements, reducing the total volume of image data that needs to be processed and transmitted, thereby reducing latency while maintaining image quality where it matters most (in the main view region).
Solution Approach 2:
The patent applies different image quality levels to different regions of the display panel. The main view region, where the user's eye is accurately focused, receives high-quality full-resolution image data. The auxiliary view region, where the user's eye is not accurately focused, receives lower-quality down-sampled image data. This local quality differentiation maintains perceived image quality while reducing overall data volume and processing latency.
2Manufacturing precision
If the number of sub-pixels is increased to improve image quality, then image quality is improved, but the volume of input image is increased leading to increased latency
Solution Approach 1:
The patent segments the sub-pixels into two groups: those in the main view region and those in the auxiliary view region. By separating these groups, the system can apply different data processing strategies to each group, reducing the total computational burden and latency.
Solution Approach 2:
The patent applies partial action by providing full-resolution image data only to the main view region sub-pixels where it is actually needed for accurate focus, while providing reduced-resolution data to the auxiliary view region sub-pixels where the user's unfocused eye cannot perceive the full detail anyway.
3Manufacturing precision
If full image data is transmitted to all sub-pixels to maintain image quality, then image quality is maintained, but processing speed is reduced due to increased data volume
Solution Approach 1:
The patent extracts and removes redundant image data from the auxiliary view region by applying down-sampling or reduction processing. This extraction of unnecessary full-resolution data for the auxiliary region reduces the total data volume that needs to be processed and transmitted, thereby improving processing speed without significantly impacting perceived image quality.
Solution Approach 2:
The patent changes the resolution parameter of image data differently for different regions. The main view region maintains the original high-resolution parameter, while the auxiliary view region uses a reduced resolution parameter. This parameter differentiation optimizes the balance between image quality and processing speed.
Data Source
AI summary
A display system for virtual reality and a method of driving the same are disclosed. In the display system for virtual reality, auxiliary image data, the number of which is smaller than the number of auxiliary sub pixels disposed in an auxiliary view region, is transmitted to a display device and the same auxiliary image data is supplied to sub-pixels of an auxiliary view region in which a user eye is not accurately focused. Accordingly, the display system for virtual reality reduces a volume of auxiliary image data supplied to the auxiliary view region to overcome latency.