Decentered Lens Array for Head-Mounted Display Field of View
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Solution Overview
Problem
Existing head-mounted display devices suffer from limited field of view and image distortion due to the misalignment of the optical sweet spot of the lens array.
Innovation Solution
The implementation of a decenter structure in the lens array of head-mounted display devices, where the optical sweet spot is intentionally shifted from the center of the display panel, allows for symmetric arrangement of circuit boards and lenses, reducing image distortion and expanding the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the optical sweet spot of the lens array is centered on the display panel, then the device structure is simple and fabrication is easier, but the field of view is limited and image distortion occurs
Solution Approach 1:
The patent applies asymmetry by intentionally decentering the optical sweet spot of the lens array from the center of the display panel. The lens array is positioned such that its optical sweet spot aligns with the user's pupil position rather than the display panel center, creating an asymmetric configuration that expands the field of view and reduces image distortion while maintaining manufacturability through standardized components.
2Device complexity
If the optical sweet spot of the lens array is centered on the display panel, then the device structure is simple, but image distortion occurs
Solution Approach 1:
The patent uses asymmetry to resolve the contradiction between structural simplicity and image quality. By positioning the lens array's optical sweet spot at a predetermined offset from the display panel center (specifically, at a position corresponding to the user's pupil location), the design achieves reduced image distortion and expanded field of view while maintaining a relatively simple overall structure that does not require complex additional components.
3Ease of manufacture
If the optical sweet spot of the lens array is centered on the display panel, then fabrication cost is lower, but the field of view is limited
Solution Approach 1:
The patent implements asymmetry by decentering the lens array position relative to the display panel, specifically positioning the optical sweet spot at a predetermined distance from the center toward the user's pupil position. This asymmetric arrangement expands the effective field of view and reduces image distortion without requiring expensive additional optical components or complex structural modifications, thereby maintaining cost-effectiveness.
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 approach effectively reduces image distortion and expands the field of view, while also simplifying the device structure and lowering fabrication costs.
Implementation Method 1
an optical layer that includes lenses disposed on the emission material layer
Data Source
AI summary
A mobile display device includes a first display device that provides images to a user's left eye, a second display device that provides images to the user's right eye, a display device housing that accommodates the first display device and the second display device, and a housing cover that covers the display device housing and includes a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device. Each of the first display device and the second display device includes a display panel and a circuit board disposed at one end of the display panel and that includes a driver circuit. The circuit board of the first display device and the circuit board of the second display device are symmetrically arranged with respect to a center of the housing cover located between the first eyepiece and the second eyepiece.