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Electronic compensation methods and systems for optical devices using liquid crystal based microdisplay devices

A technology of electronic display and liquid crystal materials, applied in optics, nonlinear optics, electrical components, etc., can solve problems such as expensive and complex active alignment technology

Pending Publication Date: 2021-08-31
LUMUS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such active alignment techniques are complex and require dedicated optical test bench equipment, which can be prohibitively expensive

Method used

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  • Electronic compensation methods and systems for optical devices using liquid crystal based microdisplay devices
  • Electronic compensation methods and systems for optical devices using liquid crystal based microdisplay devices
  • Electronic compensation methods and systems for optical devices using liquid crystal based microdisplay devices

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Embodiment Construction

[0062] The present invention relates to methods, systems and apparatus for electronically compensating for misalignment of optical elements, particularly birefringent elements, using liquid crystal based electronic display devices.

[0063] The principles and operation of optical devices and systems according to the present invention may be better understood with reference to the accompanying drawings of the specification.

[0064] Before describing in detail at least one embodiment of the present invention, it should be understood that the application of the present invention is not necessarily limited to the construction and arrangement of components set forth in the following description and / or shown in the drawings and / or examples and / or or method details. The invention is capable of other embodiments or of being practiced or carried out in various ways. Initially, throughout the document, references are made to directions such as top and bottom, clockwise and countercloc...

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Abstract

An electronic display device and a birefringent element are obtained. The electronic display device has liquid crystal material deployed between two transparent electrodes. The electronic display device and the birefringent element each have respective polarization axes. The electronic display device and the birefringent element are deployed relative to each other such that the polarization axes of the electronic display device are rotationally offset from the polarization axes of the birefringent element by an offset amount in accordance with a predetermined direction of rotation. A compensation voltage that is proportional to the offset amount is determined. The compensation voltage is applied across the transparent electrodes to induce the liquid crystal material to assume an intermediate state. The electronic display device produces polarized image light waves having polarization in a polarization direction in accordance with the intermediate state assumed by the liquid crystal material and that compensates for the rotational offset.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 797,973, filed January 29, 2019, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to optical devices and systems, and in particular to optical devices and systems including image projection optics that project images generated by liquid crystal-based electronic microdisplays, such as liquid crystal on silicon (LCoS) displays and liquid crystal displays (LCoS) LCD) device) produces images. Background technique [0004] In the field of head-mounted displays (HMD) and near-eye displays (NED), there is a particular need for compact optical devices, where the optical module performs the functions of image generation and collimation of the image to infinity for delivery to the viewer's eyes. Images can be obtained from electronic display devices: from spatial light modulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13363G02F1/139
CPCG02F1/133528G02F2203/02G02F2202/02G02F1/133531G02F1/133638G02F1/1309H04N9/3167
Inventor 埃坦·罗宁
Owner LUMUS LTD