Liquid Crystal Lens Bump Structure for Crosstalk Reduction
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Solution Overview
Problem
The presence of beads or spacers in liquid crystal lens systems causes distortion and unwanted light, degrading 3D image quality due to their interference with liquid crystal orientation near electrodes, leading to increased crosstalk in three-dimensional display devices.
Innovation Solution
A liquid crystal lens structure is designed with a bead spacer positioned between transparent substrates, where a bump on the strip-like electrode covers the bead, maintaining the bead away from the electrode's upper part, and the bump's aspect ratio is optimized to prevent bead displacement and ensure proper liquid crystal orientation, thereby reducing crosstalk and enhancing 3D image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a bead spacer is used to maintain distance between transparent substrates in a liquid crystal lens system, then the substrate spacing is maintained, but the bead causes liquid crystal orientation disturbance and unwanted light that degrades 3D image quality
Solution Approach 1:
The harmful bead spacer is extracted or removed from the vicinity of the strip-like electrode. The patent achieves this by positioning the bead at the end portion of the strip-like electrode rather than along its entire length, thereby eliminating the orientation disturbance in the critical electrode region while maintaining substrate spacing where needed.
Solution Approach 2:
The bead's position is optimized to have local quality - it is placed only at the end portion of the strip-like electrode where it provides spacing functionality without interfering with the liquid crystal orientation in the electrode's active region. This localized positioning allows the system to have different properties in different regions: spacing maintenance at the end versus undisturbed orientation in the electrode area.
2Reliability
If beads are positioned near strip-like electrodes for spacing, then substrate distance is maintained, but crosstalk increases due to unwanted light from bead-electrode interaction
Solution Approach 1:
The bead is extracted from the harmful position near the electrode's upper part and relocated to the end portion of the strip-like electrode. This removal from the critical interaction zone eliminates the source of unwanted light generation while preserving the spacing function.
Solution Approach 2:
The bead's presence is converted from harmful to beneficial by strategically positioning it at the end portion of the electrode. In this location, it maintains substrate spacing (beneficial function) without causing orientation disturbance or unwanted light (harmful effects are eliminated), thus transforming a potentially harmful element into a purely beneficial one.
3Object-affected harmful factors
If bump aspect ratio is optimized to cover the bead, then bead displacement is prevented and liquid crystal orientation is maintained, but device structure becomes more complex
Solution Approach 1:
The bump's aspect ratio is optimized within a specific range (0.5 to 2.0) to achieve the desired function. By controlling this geometric parameter, the bump can effectively cover the bead and maintain liquid crystal orientation without requiring overly complex structures. The parameter optimization balances functionality with structural simplicity.
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 effectively prevents bead-induced distortion, minimizing crosstalk and ensuring high-quality 3D image display by maintaining the bead's position away from the strip-like electrode, thus improving the overall image quality in liquid crystal lens systems.
Implementation Method 1
controlling the orientation of the liquid crystal molecules of the second liquid crystal display panel, changing the refractive index in the second liquid crystal display panel
Implementation Method 2
controlling the orientation of the liquid crystal molecules
Implementation Method 3
controlling the refractive index of the liquid crystal molecules by the control of the voltage to be applied to the strip-like electrode
Data Source
AI summary
In a three-dimensional display device using a liquid crystal lens, a planer electrode is formed on an upper substrate of the liquid crystal lens and strip-like electrodes are formed on a lower substrate of the liquid crystal display lens. The distance between the upper and lower substrates is provided by a bead. At this time, if the bead is present on the strip-like electrode, the lens formed thereon is distorted. In order to prevent this, a bump is formed to cover the strip-like electrode. The distance between the bump and the upper substrate is small, so that the bead is pushed out of the upper part of the strip-like electrode, preventing the lens from being distorted. As a result, it is possible to prevent the crosstalk caused by the lens distortion due to the presence of the bead on the strip-like electrode.