Head Mounted Display with Gaze-Adaptive Resolution
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Solution Overview
Problem
Existing head-mounted displays (HMDs) face challenges in achieving a simplified and reduced optical system while maintaining satisfactory visual recognition, particularly in achieving a see-through optical system with reduced weight and size, and in efficiently managing resolution across different visual fields.
Innovation Solution
The HMD incorporates an image display section with higher central resolution than peripheral resolution, a sightline detection section to adjust the image display based on changes in the viewer's gaze, and an image control section that adjusts the display aspect in response to changes in the sightline direction and posture, utilizing a pixel matrix with different pixel structures for central and peripheral areas, and potentially employing hologram elements or area scanning for image formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If uniform high resolution is provided across the entire image display area, then satisfactory visual recognition is maintained, but the optical system becomes more complex and larger in size
Solution Approach 1:
The patent applies local quality by providing high resolution only in the central image display area corresponding to the foveal vision region, while reducing resolution in peripheral areas. This matches the human visual system's characteristics where central vision requires high acuity for detailed tasks like reading, while peripheral vision tolerates lower resolution. The display device thus optimizes optical system complexity by concentrating high-resolution resources where they are most needed.
Solution Approach 2:
The patent segments the image display area into multiple resolution zones: a central high-resolution area and peripheral lower-resolution areas. This segmentation allows the optical system to be designed with different resolution characteristics for different regions, reducing overall system complexity while maintaining satisfactory visual recognition in the critical central region.
2Measurement precision
If high resolution is maintained across the entire image display area, then image quality is preserved, but the device weight increases
Solution Approach 1:
The patent reduces device weight by implementing local quality differentiation across the display area. High resolution is maintained only in the central region where visual acuity is most sensitive, while peripheral regions use lower resolution. This approach significantly reduces the optical system weight compared to uniform high-resolution designs, making the head-mounted display more comfortable for prolonged wear.
3Measurement precision
If high resolution is provided across the entire image display area, then visual recognition is satisfactory, but the device size increases
Solution Approach 1:
The patent reduces device volume by applying local quality principles to the optical system design. High resolution is concentrated in the central image display area, allowing the optical components to be smaller and more compact. This enables the head-mounted display to achieve satisfactory visual recognition in the critical central region while minimizing overall device volume for better wearability.
4Device complexity
If the image display section is simplified and reduced in size, then device compactness is improved, but visual recognition quality may degrade
Solution Approach 1:
The patent successfully simplifies the optical system while maintaining visual recognition quality by concentrating high-resolution capabilities in the central image display area. This local quality approach allows the overall optical system to be more compact and simpler than uniform high-resolution designs, while still providing satisfactory visual recognition for central tasks like reading and detailed observation.
Solution Approach 2:
The patent segments the visual field into central and peripheral regions with different resolution requirements. This segmentation enables the optical system to be simplified and reduced in size while maintaining high visual recognition quality in the central region, as the peripheral regions can tolerate lower resolution.
5Device complexity
If resolution is reduced in peripheral areas, then optical system complexity is reduced, but image quality in peripheral areas degrades
Solution Approach 1:
The patent accepts peripheral image quality degradation as a necessary trade-off for reducing optical system complexity. By implementing local quality differentiation, the system provides high resolution where it matters most (central vision) while allowing lower resolution in peripheral areas where visual acuity is naturally lower. This approach successfully reduces optical system complexity while maintaining satisfactory overall visual recognition.
Data Source
AI summary
In a head mounted display, an image is displayed with central resolution higher than peripheral resolution or the peripheral resolution is not necessarily high resolution, and a controller changes the display aspect of the image formed by an image formation apparatus in accordance with a change in the sightline detected with a sightline sensor.