Near-Eye Display Magnifier Lens Shift for Aberration Compensation
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Solution Overview
Problem
Conventional near-eye display systems, such as head-mounted displays, often experience vergence-accommodation conflicts and gaze-dependent aberrations due to mismatches between the vergence and accommodation distances, leading to user discomfort and fatigue, especially when viewing virtual or augmented reality content.
Innovation Solution
The implementation of a dynamic magnifier lens shifting technique, coupled with eye tracking, adjusts the magnifier lenses relative to the user's eyes to match the vergence and accommodation planes, and corrects for gaze-dependent aberrations by shifting the lenses along the X, Y, and Z axes, ensuring a consistent and immersive viewing experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed display panel is used in conventional near-eye display systems, then the device structure is simple, but vergence-accommodation conflicts occur causing user discomfort and fatigue
Solution Approach 1:
The patent applies the dynamics principle by making the magnifier lens position adjustable rather than fixed. The lens can be dynamically repositioned along the optical axis to match the virtual depth of displayed objects, thereby synchronizing accommodation distance with vergence distance. This dynamic adjustment resolves the vergence-accommodation conflict that occurs with fixed display panels, improving user comfort without requiring complete structural redesign of the display system.
2Area of stationary object
If magnifier lenses are used to extend field-of-view, then the field-of-view is widened, but gaze-dependent aberrations increase
Solution Approach 1:
The patent applies dynamics by enabling real-time repositioning of magnifier lenses based on detected gaze direction. As users look at different locations on the display panel, the system dynamically adjusts lens positions to compensate for gaze-dependent aberrations. This allows maintaining a wide field-of-view while continuously correcting optical distortions, thereby preserving both immersion and image quality.
Solution Approach 2:
The patent implements feedback by using eye tracking to detect user gaze position and using this information to adjust magnifier lens positions in real-time. The feedback loop ensures that aberrations are continuously compensated for based on actual viewing conditions, allowing the system to maintain optical quality across the entire field-of-view without sacrificing the widened viewing angle.
3Length of moving object
If the display panel is positioned close to the eyes, then the device size is reduced, but vergence-accommodation distance mismatch increases
Solution Approach 1:
The patent applies dynamics by introducing adjustable magnifier lenses that can be repositioned to match the virtual depth of displayed content. This allows the display panel to remain close to the eyes for compact device size while the dynamic lens adjustment compensates for the resulting vergence-accommodation mismatch. The system effectively decouples the physical distance constraint from the optical performance requirement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively mitigates vergence-accommodation conflicts and gaze-dependent aberrations, maintaining a wide field-of-view and high frame-rate without reducing the focusing power of optical components, thereby enhancing user comfort and immersion in virtual or augmented reality experiences.
Implementation Method 1
the magnifier lenses shift the accommodation plane in VR to match the vergence plane
Implementation Method 2
one or more optical components configured to focus a corresponding region of the display panel onto a pupil of the eye
Data Source
AI summary
A method of operation in a near-eye display system includes determining, using an eye tracking component of the near-eye display system, a pose of a user's eye. A shift vector is determined for a magnifier lens of the near-eye display system based on the pose of the user's eye, and the shift vector is communicated to an actuator of the near-eye display system to instruct translation of the magnifier lens relative to the user's eye. After translation of the magnifier lens, an array of elemental images is rendered at a position within a near-eye lightfield frame and communicated for display at a display panel of the near-eye display system.