Stereoscopic Display Lens Panel Crosstalk Reduction
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Solution Overview
Problem
Stereoscopic image display devices using a liquid crystal layer in a Fresnel lens form face challenges in achieving an ideal lens due to a small pitch, leading to difficulties in realizing effective image separation for binocular parallax images.
Innovation Solution
A stereoscopic image display device comprising a display panel with a lens panel that includes a lower substrate, a lower electrode layer, a liquid crystal layer tilted in a lens form, and an upper electrode layer with pattern omissions, generating electric fields to form a Fresnel lens structure that reduces crosstalk and improves image separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a liquid crystal layer is used in a Fresnel lens form with a small pitch, then the lens panel can be made thinner, but it becomes difficult to realize an ideal lens and achieve effective image separation
Solution Approach 1:
The patent divides the lens structure into multiple discrete lens units arranged in an array, where each lens unit corresponds to a specific pixel or pixel group. This segmentation allows each individual lens to be optimized for ideal focal length and curvature, while the overall array maintains a thin profile. The segmentation principle resolves the contradiction by enabling precise lens formation at the micro-scale while keeping the macro-scale panel thin.
Solution Approach 2:
The patent optimizes specific parameters of the liquid crystal layer including cell gap, refractive index anisotropy, and voltage application patterns to achieve ideal lens formation. By carefully controlling the cell gap and applying specific voltages to create precise refractive index gradients, the system forms high-quality lenses despite the thin overall panel structure. This parameter optimization resolves the contradiction between thinness and lens quality.
2Length of stationary object
If a liquid crystal layer is used in a Fresnel lens form with a small pitch, then the lens panel can be made thinner, but crosstalk between left and right eye images increases
Solution Approach 1:
The patent assigns specific lens units to control light for the left eye and other lens units for the right eye, creating spatially separated optical paths. This segmentation of optical control prevents crosstalk by ensuring that light intended for one eye is directed only to that eye's viewing zone, even though the overall panel remains thin.
Solution Approach 2:
The patent applies different optical properties to different regions of the lens array, with specific areas optimized for left-eye viewing and other areas for right-eye viewing. By creating local optical zones with tailored characteristics, the system eliminates crosstalk while maintaining a thin overall structure.
3Device complexity
If electrodes are continuously formed without pattern omissions, then the lens structure can be simplified, but image quality and crosstalk reduction are compromised
Solution Approach 1:
The patent removes electrodes in specific pattern omission areas to create distinct optical zones. By extracting electrodes from certain regions, the system creates clear boundaries between left-eye and right-eye viewing zones, improving image separation precision. This selective removal of electrodes, while increasing structural complexity, enables superior optical performance and reduced crosstalk.
4Length of stationary object
If the lens pitch is reduced to achieve a thinner panel, then panel thickness decreases, but the ability to form ideal lenses is compromised
Solution Approach 1:
The patent transitions from thinking about lens pitch in a single dimension to optimizing across multiple dimensions including cell gap, refractive index gradient, and voltage distribution. By solving the lens formation problem in these additional dimensions, the system achieves ideal lens quality despite reduced pitch in the planar dimension, enabling thin panels with high optical performance.
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 effectively reduces crosstalk between images for the left and right eyes, enhancing the quality of stereoscopic images and achieving a thinner lens panel with improved image display quality comparable to a single liquid crystal electric field lens.
Implementation Method 1
electric fields generated between the first and second lower electrode layers and the upper electrode layer
Implementation Method 2
a liquid crystal layer disposed on the lower electrode layer and tilted in a lens form
Implementation Method 3
tilted in a lens form by electric fields generated... generating electric fields to form a Fresnel lens structure
Implementation Method 4
uses binocular parallax images which are great in the stereoscopic effect
Data Source
AI summary
A stereoscopic image display device comprises a display panel, and a lens panel disposed on one surface of the display panel, wherein the lens panel includes, a lower substrate, a lower electrode layer having electrodes divided in plurality on one surface of the lower substrate, a liquid crystal layer disposed on the lower electrode layer and tilted in a lens form, an upper substrate combined to the lower substrate, and an upper electrode layer disposed on one surface of the upper substrate and having pattern omissions where a part of electrodes is omitted in areas corresponding to a surface of discontinuity of the lens form.