An augmented reality device

By designing eyepiece components and light projection components in augmented reality devices, using light transmitting sheets, polarization elements, phase retarders and birefringent crystals, the problems of ambient light influence and insufficient display brightness in existing equipment are solved, and the display effects of high definition, multi-deep field and high brightness are achieved, improving the user experience.

CN112835195BActive Publication Date: 2025-03-28LIGHTIN INC
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Patent Information

Application Number
CN201911156670.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-11-22
Publication Date
2025-03-28
Estimated Expiration
2039-11-22

AI Technical Summary

Technical Problem

Due to the influence of ambient light and insufficient display brightness, existing augmented reality devices have low sharpness and resolution of image display, poor user experience, and unadjusted depth of field, resulting in poor experiences such as vertigo.

Method used

An augmented reality device was designed, including eyepiece components and light projection components. The eyepiece assembly prevents ambient light from being incident and improves the display effect through a combination of a light-transmitting sheet, a polarization element and a phase retarder. The light projection assembly uses a first polarizer, a birefringent crystal and a phase retarder to achieve "spherical imaging" image output at multiple depths of field.

Benefits of technology

Effectively prevent ambient light from incident, improve display effect and user experience; realize image output of multiple depths of field to ensure image quality and imaging clarity; reduce natural light loss and improve display brightness through polarized light processing.

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Abstract

The present disclosure relates to an augmented reality device, including an eyepiece assembly and a light projection assembly; the eyepiece assembly includes: a light-transmitting sheet; a first polarizing element, arranged on a first surface of the light-transmitting sheet close to the observation side, configured to transmit light in a first polarization direction and absorb light in a second polarization direction; a second polarizing element, arranged on a second surface of the light-transmitting sheet away from the observation side, configured to transmit light in the first polarization direction and reflect light in the second polarization direction; a phase retarder, arranged on a side of the light-transmitting sheet away from the observation side, and a reflective device is arranged on a side of the phase retarder away from the light-transmitting sheet; the light projection direction of the light projection assembly is toward the second surface of the light-transmitting sheet, a light source is arranged before it, and the light projection assembly includes: a first polarizer, a first optical switch, a first birefringent crystal, a second phase retarder, a second birefringent crystal, and a second optical switch in sequence. By using the embodiments of the present disclosure, the display effect of the augmented reality device can be improved and the user experience can be improved.
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