Head-Mounted Display Image Scaling for Low-Latency VR Transmission
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Solution Overview
Problem
Existing image display systems face challenges in maintaining high-quality image display with low delay and comfort due to increased data transfer demands, which can lead to motion sickness and reduced usability in head-mounted displays.
Innovation Solution
An image display system and method that includes an image generation device and head-mounted display, where the generation device reduces image data with varying reduction ratios for different regions and the display device restores the image to its original size, optimizing data transmission and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image resolution and computation are increased to achieve increased reality of image representation, then image quality is improved, but processing costs and data transfer requirements increase
Solution Approach 1:
The patent applies local quality by transmitting image data with different resolution levels for different regions of the image. The central region (fovea) corresponding to the user's direct line of sight is transmitted at high resolution, while peripheral regions are transmitted at lower resolution. This allows the system to maintain high image quality where the user is most sensitive while reducing overall data transfer requirements.
2Manufacturing precision
If data transfer amount increases to maintain high image quality, then image quality is preserved, but display delay increases
Solution Approach 1:
By transmitting only the necessary amount of data for each region based on human visual characteristics, the system reduces overall data transfer time while maintaining perceived image quality. The high-priority central region receives sufficient data quality, while lower-priority peripheral regions use reduced data, preventing display delay.
3Manufacturing precision
If communication and processing loads increase to maintain high image quality, then image quality is improved, but power consumption increases
Solution Approach 1:
The system reduces power consumption by processing and transmitting image data at different quality levels for different regions. The image generation device performs selective processing based on regional importance, and the head-mounted display processes fewer high-resolution pixels in peripheral areas, collectively reducing the energy required for communication and processing while maintaining acceptable image quality.
4Manufacturing precision
If head-mounted display processes more data to maintain high image quality, then image quality is improved, but device weight and heat generation increase
Solution Approach 1:
The patent reduces the computational burden on the head-mounted display by receiving image data that has already been optimally processed at the source device. The display device only needs to restore and display the selectively processed image data, rather than performing complex real-time processing on full-resolution images, thereby reducing required processing power, weight, and heat generation.
Data Source
AI summary
A condition information acquisition section of an image generation device acquires a condition of communication and condition information of a head-mounted display. An image generation section generates a display image including distorted images for a left eye and a right eye. A reduction processing section converts the display image to data in which different regions have different reduction ratios in accordance with the condition of communication, etc., and transmits the data through an output section. An image size restoration section of the head-mounted display restores the transmitted data to the display image in an original size to cause the display image to be displayed by a display section.