VR GPU Power Management via Image Data Absence Detection
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Solution Overview
Problem
Current VR/AR/MR systems face challenges in providing a comfortable, natural, and efficient presentation of virtual image elements, with issues related to image processing, optical distortions, size, portability, battery life, and system overheating, necessitating improved techniques for image rendering and power management.
Innovation Solution
The proposed method involves a GPU detecting the absence of image data to shut down unnecessary components, reorganizing frame data to reduce transfer time, compressing and reordering image data, and using wake-up signals to optimize communication links, while the DB reconstructs and blends image data to enhance display efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the GPU continuously processes and transmits image data to the display panel, then the display quality and responsiveness are maintained, but power consumption increases and battery life decreases
Solution Approach 1:
The system implements periodic action by detecting absence of image data and selectively shutting down GPU components and communication links only during periods when no image data is present, while maintaining operational status during periods when image data is present. This allows the system to alternate between active and low-power states, reducing overall power consumption while maintaining display quality during actual content display.
2Manufacturing precision
If the GPU processes complete frames of image data, then image quality is maintained, but processing time and latency increase
Solution Approach 1:
The system applies segmentation by dividing the image data processing into segments based on presence or absence of actual image content. Instead of uniformly processing complete frames, the GPU processes only segments containing actual image data while skipping segments with absence of image data. This segmented approach maintains image quality for displayed content while significantly reducing processing time and latency by eliminating unnecessary processing of blank or absent frames.
3Speed
If communication links between GPU, DB, and display panel remain active, then data transmission speed is maintained, but system heat generation increases
Solution Approach 1:
The system implements periodic action by dynamically activating and deactivating communication links between GPU, display bridge (DB), and display panel based on the presence or absence of image data. During periods when image data is absent, communication links are shut down to reduce heat generation. When image data is present, links are activated to maintain data transmission speed. This periodic activation/deactivation cycle maintains performance during content display while reducing thermal load during idle periods.
Data Source
AI summary
A method in a virtual, augmented, or mixed reality system includes a GPU determining/detecting an absence of image data. The method also includes shutting down a portion/component/function of the GPU. The method further includes shutting down a communication link between the GPU and a DB. Moreover, the method includes shutting down a portion/component/function of the DB. In addition, the method includes shutting down a communication link between the DB and a display panel. The further also includes shutting down a portion/component/function of the display panel.


