Double-Layer Liquid Crystal Lens Alignment for Anti-Peeking Displays
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Solution Overview
Problem
Current anti-peeping display technologies suffer from mura patterns due to low alignment accuracy in double-layer liquid crystal lenses, limiting their ability to switch between anti-peeping and sharing modes effectively.
Innovation Solution
An optical assembly comprising two substrates with liquid crystals and strategically positioned electrodes on each substrate to form synchronized electric fields, ensuring high alignment accuracy and consistent spatial distribution, thereby forming a double-layer liquid crystal lens structure that can switch between anti-peeping and sharing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a double-layer liquid crystal lens is used to enable switching between anti-peeping and sharing modes, then the adaptability of the display device is improved, but mura patterns are generated due to low alignment accuracy
Solution Approach 1:
The patent merges the control of two liquid crystal layers into a single integrated liquid crystal cell structure. By combining the alignment layers and liquid crystal materials into one cell, the alignment accuracy is improved because the alignment structures are formed simultaneously in the same manufacturing process, eliminating misalignment between separate layers. This integrated approach maintains the ability to form both convex and concave liquid crystal lenses for mode switching while eliminating mura patterns caused by alignment errors.
Solution Approach 2:
The patent applies preliminary alignment treatment to the liquid crystal molecules before the final lens formation. Alignment layers are pre-formed on the substrate surfaces with specific rubbing directions, and the liquid crystal molecules are pre-aligned during cell assembly. This preliminary alignment ensures that when voltages are applied to form the lenses, the molecules deflect from a known accurate baseline, preventing mura patterns during dynamic mode switching.
2Ease of operation
If electrodes are used to control liquid crystal lenses for mode switching, then the ease of operation is improved, but alignment accuracy deteriorates leading to mura patterns
Solution Approach 1:
The patent applies different alignment characteristics to different regions of the liquid crystal cell. Alignment layers with different rubbing directions are formed in different regions, allowing the liquid crystal molecules to be oriented differently in various areas. This local differentiation enables precise control of lens formation in specific regions while maintaining overall alignment accuracy, preventing mura patterns during electrode-controlled mode switching.
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
The solution enables seamless switching between anti-peeping and sharing display modes, enhancing user experience by maintaining high image quality and adjusting the viewing angle effectively, while eliminating mura issues.
Implementation Method 1
at least two first electrodes being configured to form a first electric field for driving liquid crystal molecules proximal to the first substrate to deflect
Implementation Method 2
liquid crystals, filled between the first substrate and the second substrate
Data Source
AI summary
An optical assembly, a display device and a method for driving the same are provided. The optical assembly includes two substrates disposed opposite to each other, and electrodes are disposed on the two substrates respectively. Voltages are applied to the electrodes to form a transverse electric field being configured for driving liquid crystal molecules proximal to the substrates to deflect, so that liquid crystal proximal to the two substrates both form liquid crystal lenses, thereby forming a double-layer liquid crystal lens structure. Since the two substrates of a liquid crystal cell have high alignment accuracy, the electrodes on the two substrates are consistent in spatial distribution, thereby solving mura problem.