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    ELECTRO-ACTIVE LENSES WITH RAISED RESISTIVE BRIDGES
    41.
    发明申请
    ELECTRO-ACTIVE LENSES WITH RAISED RESISTIVE BRIDGES 有权

    公开(公告)号：US20210389641A1

    公开(公告)日：2021-12-16

    申请号：US17336792

    申请日：2021-06-02

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten ,  Harry Milton

    IPC: G02F1/29 ,  A61F2/16

    Abstract: Resistive bridges can connect many ring electrodes in an electro-active lens with a relatively small number of buss lines. These resistors are usually large to prevent excessive current consumption. Conventionally, they are disposed in the same plane as the ring electrodes, which means that the ring electrodes are spaced farther apart or made discontinuous to accommodate the resistors. But spacing the ring electrodes farther apart or making them discontinuous degrades the lens's optical quality. Placing the ring electrodes and resistors on layers separated by an insulator makes it possible for the ring electrodes to be closer together and continuous with resistance high enough to limit current consumption. It also relaxes constraints on feature sizes and placement during the process used to make the lens. And because the resistors and electrodes are on different planes, they can be formed of materials with different resistivities.

    Beam steering devices
    43.
    发明授权
    Beam steering devices 有权

    公开(公告)号：US11126061B2

    公开(公告)日：2021-09-21

    申请号：US16783863

    申请日：2020-02-06

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten

    IPC: G02F1/295 ,  G02C7/08 ,  G02B27/01 ,  G02F1/1335 ,  G02C7/04 ,  G02C7/02

    Abstract: A beam steering device includes a substrate with a first refractive index that defines a cavity, an electroactive material in the cavity that has a variable refractive index, and two sets of opposing overlays. The overlays in one set of opposing overlays are parallel to each other, while the overlays in the other set are tilted with respect to each other. This allows one or more electric fields between the overlays to be used to align the electroactive material in two different directions to change its refractive index, allowing for a faster speed of beam steering through refraction than conventional approaches.

    Dynamic focusing head mounted display
    45.
    发明授权
    Dynamic focusing head mounted display 有权

    公开(公告)号：US10782526B2

    公开(公告)日：2020-09-22

    申请号：US15589376

    申请日：2017-05-08

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten

    IPC: G02B7/04 ,  G02B27/01 ,  G02B27/16 ,  G02B27/40 ,  G02B26/00 ,  G02B3/14 ,  G02B5/10

    Abstract: A conventional head-mounted display (HMDs) can display a virtual image at a fixed focus (e.g., infinite focus). If the user looks at an object that appears closer than the virtual image, then accommodation by the user's eyes will cause the virtual image to appear blurry. The HMDs disclosed herein include a dynamic electro-active focusing element that changes the focus of the virtual image to account for accommodation by the user. This dynamic electro-active focusing element may include a curved layer of electro-active material, such as nematic or bi-stable (e.g., cholesteric) liquid crystal, disposed between a static concave mirror and a convex surface on a beam splitter or other optical element. Changing the refractive index of the electro-active material causes the focus of the dynamic electro-active focusing element, making it possible to shift the virtual image's focus in as the user's eyes change focus.

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