Display Warp Processing Circuit for Low-Latency AR Alignment
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Solution Overview
Problem
Existing head-up display systems face long processing times and insufficient correction of position differences between augmented reality virtual objects and real objects due to sequential vibration and distortion corrections, leading to delayed and inaccurate image display.
Innovation Solution
A circuit apparatus and method for head-up displays that perform simultaneous distortion and vibration corrections on separate image areas using distinct warp parameters, allowing for efficient warp processing close to display time, thereby reducing latency and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distortion correction is performed after vibration correction sequentially, then both corrections can be applied to the image, but the processing time from vibration correction to display output becomes longer
Solution Approach 1:
The patent combines vibration correction and distortion correction into a single integrated processing step. The correction unit performs both corrections simultaneously by applying composite correction parameters that incorporate both vibration correction amounts and distortion correction amounts, eliminating the sequential processing delay while maintaining correction accuracy.
Solution Approach 2:
The patent pre-calculates and stores distortion correction parameters in advance. When vibration correction is needed, the system retrieves the pre-computed distortion correction parameters and combines them with current vibration correction amounts, allowing both corrections to be applied without waiting for sequential processing of distortion correction.
2Adaptability or versatility
If multiple separate pictures are corrected and synthesized, then both vibration-corrected and non-vibration-corrected areas can be displayed, but the processing time from position correction to display output becomes longer
Solution Approach 1:
The patent merges the correction of multiple picture regions into a single unified correction process. Instead of separately correcting vibration-corrected areas and non-vibration-corrected areas in different pictures, the system applies appropriate correction parameters to different regions within a single integrated processing framework, reducing the overall processing time while maintaining display flexibility.
Solution Approach 2:
The patent applies different correction strategies to different local regions of the display area. The correction unit determines whether each region requires vibration correction based on its position and characteristics, applying vibration correction parameters only where needed while maintaining fixed views in other regions, thereby optimizing processing efficiency for mixed AR and fixed view displays.
3Measurement precision
If vibration correction is performed with sufficient accuracy, then the display position difference of the AR virtual object relative to the real object is minimized, but the correction must be performed close to display time which conflicts with sequential distortion correction processing
Solution Approach 1:
The patent merges vibration correction and distortion correction into a single simultaneous processing operation. By computing composite correction parameters that incorporate both vibration correction amounts and distortion correction amounts together, the system achieves accurate position difference correction close to display time without the delays introduced by sequential processing.
Data Source
AI summary
A circuit apparatus includes a memory unit and a warp processing unit. The memory unit stores a warp object image. The warp processing unit performs warp processing on the warp object image and generates a display image displayed in a display area. The warp processing unit performs the warp processing on an image of a first view object of the warp object image based on a first warp parameter for vibration correction and distortion correction. Further, the warp processing unit performs the warp processing on an image of a second view object of the warp object image based on a second warp parameter for the distortion correction.