Alignment system and alignment method

By calculating weight values ​​using sensors and processors in the alignment system to determine the position of the projection target, the problem of uneven brightness caused by misalignment during the assembly of multi-layer waveguide modules is solved, resulting in better imaging quality and user experience.

CN122194482APending Publication Date: 2026-06-12AU OPTRONICS CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AU OPTRONICS CORP
Filing Date
2026-04-17
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

During the assembly of multi-layer waveguide modules, due to cutting tolerances, bonding tolerances, and minute displacements caused by thermal expansion or stress, misalignment inevitably occurs between waveguide layers. This results in the projector's imaging beam not being effectively coupled in, causing reduced brightness, uneven brightness, and even partial loss of viewing angle, which seriously affects imaging quality and user experience.

Method used

An alignment system is provided, which obtains the center coordinates of each waveguide layer through sensors, calculates weight values ​​based on brightness and human visual sensitivity, performs weighted calculations to determine the position of the projection target, and uses a processor to control the projector to align the light to that position, thereby compensating for waveguide misalignment caused by process tolerances.

Benefits of technology

Significantly optimizes the brightness and uniformity of the image, enhances the visual experience of augmented reality devices, and ensures optimized optical display performance.

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Abstract

An alignment system includes a multi-layer waveguide module, a projector, a sensor and a processor. The multi-layer waveguide module includes a first waveguide and a second waveguide. The first waveguide includes a first in-coupling element, and the second waveguide includes a second in-coupling element. The projector is configured to emit light toward the first in-coupling element and the second in-coupling element. The sensor is configured to capture images of the first waveguide and the second waveguide. The processor is connected to the projector and the sensor and is configured to obtain a first center coordinate of the first in-coupling element and a second center coordinate of the second in-coupling element, generate a weight value according to brightness corresponding to the first waveguide and the second waveguide and human visual sensitivity, perform a weighted operation on the first center coordinate and the second center coordinate using the weight value to generate a projection target position, and cause the projector to emit light toward the projection target position.
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