Optical Control Element With High-Resistance Layer
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Solution Overview
Problem
Existing optical control elements with liquid crystal lenses face challenges in achieving improved quality due to linear voltage distribution issues, requiring a large number of high-resistance layers for desired performance and suffering from narrow process margins.
Innovation Solution
The optical control element incorporates a high-resistance layer with a resistance higher than the electrodes, where the electrodes overlap the high-resistance layer and connection portions are in contact with it, enabling a nonlinear voltage distribution that maintains performance even with variations in resistance, thus improving the quality of the liquid crystal lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a linear voltage distribution is used in the liquid crystal lens, then the manufacturing process is simple, but the quality and performance of the lens deteriorates
Solution Approach 1:
The patent applies local quality by making different regions of the electrode have different resistance values. The electrode is designed with a non-uniform resistance distribution where the resistance varies across different radial positions, enabling nonlinear voltage distribution in specific regions to achieve the desired lens quality while maintaining manufacturing simplicity
Solution Approach 2:
The patent changes the electrical parameter (resistance) of the electrode from a uniform value to a non-uniform distribution. By controlling the resistance values at different locations, the voltage distribution across the liquid crystal layer becomes nonlinear, which improves the lens quality without complicating the manufacturing process
2Manufacturing precision
If multiple high-resistance layers are added to achieve desired voltage distribution, then the lens performance improves, but the device complexity increases
Solution Approach 1:
The patent extracts the voltage distribution control function from multiple separate high-resistance layers and consolidates it into a single electrode with non-uniform resistance. This single electrode structure performs the function that previously required multiple layers, thereby reducing device complexity while maintaining the desired nonlinear voltage distribution for lens quality
3Reliability
If the resistance of the high-resistance layer is reduced to improve process margin, then the manufacturing tolerance increases, but the voltage distribution consistency deteriorates
Solution Approach 1:
The patent optimizes the resistance parameter of the electrode to achieve a balance between process margin and voltage distribution consistency. By carefully selecting the resistance value and distribution pattern, the design maintains adequate process tolerance while ensuring consistent nonlinear voltage distribution across manufacturing variations
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 configuration allows for a liquid crystal lens with improved quality that maintains voltage distribution consistency and adaptability, enabling effective light adjustment and phase change, suitable for use in display devices.
Implementation Method 1
a high-resistance layer having a resistance higher than that of the electrode and provided between the electrode and the liquid crystal layer
Implementation Method 2
Liquid crystal elements which can modulate liquid crystals by a voltage applied between electrodes and obtain a lens function
Data Source
AI summary
According to one embodiment, an optical control element includes a base, an electrode provided on the base, a liquid crystal layer provided on the electrode, and a high-resistance layer having a resistance higher than that of the electrode and provided between the electrode and the liquid crystal layer, wherein the electrode overlaps the high-resistance layer in plan view, and a connection portion of the high resistance layer is in contact with the electrode.