XR Frame Reprojection to Cut Unnecessary Rendering Power
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Solution Overview
Problem
Extended reality devices experience high power consumption due to rendering each frame at the screen refresh rate, even when users remain stationary or have little motion, leading to reduced battery life.
Innovation Solution
An image rendering method that determines if a change in user pose and scene content is below a threshold, skipping unnecessary frame rendering and performing transformation processing on the previous frame based on an updated pose for display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If rendering is performed for every frame at screen refresh rate, then image display quality is maintained, but power consumption increases
Solution Approach 1:
The patent applies partial action by selectively rendering only necessary frames based on motion detection. When motion is detected between frames, full rendering is performed; when no motion is detected, the previous frame is reused. This partial rendering approach maintains image quality where changes occur while avoiding unnecessary power consumption during static periods.
Solution Approach 2:
The patent implements periodic motion detection and conditional rendering at frame intervals. The system periodically checks for motion between frames and adjusts rendering accordingly, creating a rhythmic pattern of full rendering followed by frame skipping during static periods, which reduces overall power consumption while maintaining perceived quality.
2Duration of action of moving object
If rendering is performed for every frame, then image freshness is maintained, but device endurance decreases
Solution Approach 1:
The patent uses partial action by performing rendering only when necessary (when motion is detected). During static periods, the system skips rendering and reuses previous frames, thereby extending device endurance without significantly impacting user perception of image freshness, as users cannot detect differences during motionless states.
Solution Approach 2:
The patent introduces motion detection as an intermediary mechanism that mediates between frame rendering and frame display. This intermediary determines whether rendering should occur based on detected motion, allowing the system to extend battery life while maintaining perceived image freshness by rendering only when motion occurs.
3Use of energy by moving object
If frame rendering is skipped to reduce power consumption, then energy efficiency improves, but rendering precision may be compromised
Solution Approach 1:
The patent applies partial action by performing precise rendering only when motion is detected and skipping rendering during static periods. This selective approach maintains rendering precision for frames that matter (when content changes) while improving energy efficiency by avoiding redundant rendering operations during unchanged states.
Data Source
AI summary
A n image rendering method, an electronic device and a storage medium. The method includes: determining whether a preset condition is met for rendering a first frame, the preset condition includes that a change of a current target pose of a user relative to a target pose corresponding to a previous frame of the first frame is smaller than a threshold, and a current scene content is unchanged relative to a scene content corresponding to the previous frame; in response to determining that the preset condition is met, skipping rendering the first frame, and performing transformation processing on the previous frame based on an updated target pose to obtain an output frame for display; displaying the output frame through the display generation component.