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Electro-active lenses with raised resistive bridges

A resistive and lens technology, applied in the direction of lenses, nonlinear optics, instruments, etc., can solve the problem of excessive power consumption of electro-active lenses

Active Publication Date: 2019-01-11
E VISION SMART OPTICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The inventors have realized that prior art solutions to the problem of reducing the complexity of drive channels in electro-active lenses introduce a new problem: excessive power consumption of electro-active lenses

Method used

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  • Electro-active lenses with raised resistive bridges
  • Electro-active lenses with raised resistive bridges
  • Electro-active lenses with raised resistive bridges

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Embodiment Construction

[0041] The present application discloses electro-active lenses, including electro-active contact lenses and electro-active intraocular lenses, in which electrodes are connected to raised resistive bridges. For example, a resistive bridge may be provided on an insulating layer surrounding the electrodes. Placing the resistive bridge and electrodes on opposite sides of the insulating layer provides a number of advantages over electroactive lenses without resistive bridges and electroactive lenses with conventional resistive bridges. Electroactive lenses with raised resistive bridges can support more electrodes with fewer bus lines than electroactive lenses without resistive bridges. And compared to electro-active lenses with conventional resistive bridges, electro-active lenses with raised resistive bridges can support ring electrodes that are both continuous and closer together because the resistors are not placed between the ring electrodes between. Continuous closely spaced...

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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 spacingthe 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 forthe 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.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Application No. 62 / 321,501, filed April 12, 2016, which is hereby incorporated by reference in its entirety. Background technique [0003] Electro-active lenses can be made in several ways, including patterning a series of concentric electrodes of conductive material on a first substrate, then sandwiching a liquid crystal layer between the first substrate and a second substrate opposite the first . The second substrate may have one or more circular patterns of conductive material patterned thereon, or any other shape that matches or exceeds the area of ​​the patterned electrodes, so that the circuit that creates a voltage field between the two substrates can be formed. When an electric field is applied to the electrodes, the liquid crystal material between the two substrates changes its refractive index. [0004] By applying a voltage field gradient at different el...

Claims

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Application Information

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IPC IPC(8): G02F1/1343G02F1/1345G02B3/14
CPCG02F1/29G02B3/12G02F1/13306G02F1/1343G02C7/046G02B3/14G02F1/294A61F2/16G02F2201/122
Inventor A·万胡格腾H·米尔顿
Owner E VISION SMART OPTICS INC