Ophthalmic Device Patterned Tabs Optical Alignment
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Solution Overview
Problem
The integration of circuits, sensors, and actuators in ophthalmic devices often requires cosmetically undesirable electrical connections using solder-like substances, which can be aesthetically unappealing and interfere with the user's vision.
Innovation Solution
The use of patterned tabs with openings on optical elements for alignment and bonding, allowing for cleaner and more aesthetically pleasing application of conductive materials, while providing alignment markers and spaces for conductive material application during fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solder-like substances are used to connect circuits, sensors, and actuators in ophthalmic devices, then electrical connections are achieved, but cosmetic appearance deteriorates and vision may be interfered with
Solution Approach 1:
The patent extracts the harmful solder-like substances from the optical path area by providing separate connection areas where conductive materials can be applied away from the optical path, thus achieving electrical connections without cosmetic undesirability or vision interference
Solution Approach 2:
The patent introduces tabs as intermediary structures that extend from optical elements into dedicated connection areas, serving as mediators between the optical elements and conductive materials, enabling electrical connections to be made in cosmetically acceptable locations
2Ease of manufacture
If conventional bonding methods are used without alignment features, then assembly is simpler, but manufacturing precision deteriorates
Solution Approach 1:
The patent incorporates alignment markers directly on the tabs during the manufacturing of optical elements, performing the alignment preparation in advance during fabrication rather than during assembly, which maintains both manufacturing precision and assembly simplicity
Solution Approach 2:
The tabs serve multiple functions: they provide structural support for electrical connections, act as alignment markers during assembly, and facilitate precise positioning of conductive materials, thereby combining multiple functions into a single feature that improves both precision and ease of manufacture
Data Source
AI summary
An ophthalmic device including patterned tabs is disclosed herein. An example ophthalmic device may include a plurality of optical elements formed into a stack and a substrate. A subset of optical elements of the plurality of optical elements may include a tab extending radially outward from an edge perimeter of a respective optical element, and each tab may include an opening formed there through. The substrate may include a plurality of bond pads, where each optical element of the plurality of optical elements is coupled to one of the plurality of bond pads by a conductive material, and the conductive material is disposed within respective openings of the subset of optical elements of the plurality of optical elements.