Optical system and display device

By adopting an optical system with polarization modulation and optical path length change in the display device, the problem of increasing device size when the display element moves in the optical axis direction is solved, and effective adjustment of radiation conflicts and suppression of device size is achieved.

CN119731576APending Publication Date: 2025-03-28SONY GROUP CORP
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Patent Information

Application Number
CN202380052628.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-07-15
Filing Date
2023-06-09
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

When display elements such as liquid crystal displays move in the optical axis direction, the size of the device will increase accordingly, resulting in difficult to deal with radiation adjustment conflicts.

Method used

An optical system is adopted, which includes a modulation unit and an optical path portion. The modulation unit performs polarization modulation of the light from each part of the display element so that it becomes any one of a plurality of polarization lights having different polarization directions. The optical path part changes its optical path length according to the polarization direction of light, thereby adjusting the virtual image position.

Benefits of technology

By adjusting the virtual image position of each part of the light separately, the problem of radiating conflict adjustment is solved, reducing the size and weight of the device, and improving the natural virtual reality experience.

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Abstract

One aspect of the present disclosure suppresses an increase in device size while handling convergence adjustment conflicts. An optical system (3) for imaging light from a display element (2) includes: a modulation unit (5) that individually polarizes and modulates light from each portion of the display element such that the light from each portion of the display element becomes any of a plurality of polarizations having different polarization directions; the light polarized and modulated by the modulation unit passes through an optical path portion (6), wherein the optical path portion is configured such that an optical path length of the light passing through the optical path portion varies according to a polarization direction when the light is incident on the optical path portion.
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