Ophthalmic Lens Active Matrix Non-Periodic Undulations
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Solution Overview
Problem
Active-matrix ophthalmic lenses face transparency issues due to the use of opaque materials for address rows and data columns, leading to high line losses and macroscopic diffraction, which are not cost-effective and limit the size of the matrix array.
Innovation Solution
The design introduces non-periodic undulations in address rows and data columns, creating a deformed and irregular structure that distributes diffraction uniformly, reducing coherent interference and maintaining image quality without increasing costs or degrading response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conductive metal material is used for address rows and data columns, then electrical conduction is improved, but transparency is degraded
Solution Approach 1:
The patent applies asymmetry by introducing non-periodic undulations to the address rows and data columns, breaking the regular periodic structure. This asymmetric deformation distributes diffraction incoherently across multiple directions rather than concentrating it, thereby reducing the impact on transparency while maintaining the necessary electrical conduction properties of metal materials
Solution Approach 2:
The patent employs curvature by making the address rows and data columns undulate rather than remain straight. These curved, non-periodic paths transform the diffraction pattern from concentrated directional beams to distributed scattered light, improving transparency while preserving electrical functionality
2Ease of manufacture
If regular square mesh structure is used for address rows and data columns, then manufacturing is simplified, but macroscopic diffraction is increased
Solution Approach 1:
The patent transforms the symmetric regular square mesh into an asymmetric structure with non-periodic undulations. This breaks the periodicity that causes constructive interference in specific directions, eliminating the luminous cross effect while maintaining manufacturability through controlled deformation of the original regular pattern
Solution Approach 2:
The patent changes the geometric parameters of the address rows and data columns by introducing controlled undulations with specific amplitude and wavelength characteristics. This parameter modification transforms the diffraction regime from macroscopic coherent interference to microscopic incoherent scattering, reducing the harmful diffraction effect
3Illumination intensity
If transparent conductive material is used for address rows and data columns, then transparency is improved, but line losses increase
Solution Approach 1:
The patent uses composite material structures combining metal conductive layers with transparent dielectric layers. This composite approach enables simultaneous achievement of good electrical conduction through the metal and acceptable transparency through the transparent dielectric, avoiding the need to choose between purely transparent or purely conductive materials
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in an active-matrix ophthalmic lens with improved transparency and uniform haze distribution, ensuring image quality is maintained across the entire optical component area.
Implementation Method 1
A second loss of transparency, in the sense of the term 'transparent' given above, results from the macroscopic diffraction caused by the network of rows and columns of the active matrix array. Specifically, each row or column possesses a limited width (parallel to a front surface of the ophthalmic lens) which engenders a microscopic diffraction of the light that reaches the active matrix array level with the row or column.
Data Source
AI summary
An ophthalmic lens including an active matrix including pixels, addressing rows serving to control the pixels, data columns serving to supply electrical power to pixels, and at least one transistor for each pixel. In the matrix of the ophthalmic lens: each row or column undulates continuously but non-periodically on either side of a theoretical straight addressing or data line connecting the two end terminals of the row or column.