Optical waveguide, display assembly, and ar glasses

By combining the entrance pupil unit, the expansion pupil unit, the compensation unit, and the deflection unit, the light propagates through two separate paths, solving the problem of non-compact optical waveguide structure caused by the excessive size of the expansion pupil unit. This achieves miniaturization and portability of the optical waveguide under a large field of view, and simplifies the optical path design.

CN224341697UActive Publication Date: 2026-06-09SHENZHEN OPTIARK SEMICON TECH LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENZHEN OPTIARK SEMICON TECH LTD
Filing Date
2025-07-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing optical waveguide technologies, as the field of view increases, the size of the pupil expansion unit increases, resulting in an increase in the overall area of ​​the waveguide structure. This makes it difficult to achieve portability, lightweight design, and compact structure, and the optical path design is complex, lacking diversity and optimization.

Method used

The design employs a combination of entrance pupil unit, pupil expansion unit, compensation unit, and deflection unit. Light propagates through two paths, passing through the pupil expansion unit and compensation unit respectively, and then combining into a complete image at the exit pupil unit. The area of ​​the pupil expansion unit is reduced, and a compensation unit is added to receive the other part of the field of view.

Benefits of technology

It achieves miniaturization and compactness of the optical waveguide structure while maintaining a large field of view, improving the portability and comfort of the device and simplifying the optical path design.

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Abstract

This application discloses an optical waveguide, a display component, and an AR device, relating to the field of optical waveguide technology. The optical waveguide includes an entrance pupil unit, a pupil expansion unit, a compensation unit, a deflection unit, and an exit pupil unit. An image beam emitted from an optomechanical system couples into the entrance pupil unit, and a portion of the field of view light enters the pupil expansion unit, propagates through the pupil expansion unit, and exits through the exit pupil unit. The remaining portion of the field of view light enters the compensation unit, propagates through the compensation unit and deflection unit, and exits through the exit pupil unit, ultimately forming a combined image of the complete field of view at the exit pupil unit. Compared to traditional pupil expansion units, the pupil expansion unit of this application only needs to handle a portion of the field of view light propagating from the entrance pupil unit, thus reducing the area of ​​the pupil expansion unit from the source. Simultaneously, by adding a compensation unit to receive the remaining field of view light, it is possible to achieve a larger field of view range while simultaneously miniaturizing the waveguide structure.
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