Stereoscopic Display Lens Array with Anisotropic Material and Light Shielding
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Solution Overview
Problem
Current stereoscopic image display devices face issues with crosstalk and image distortion due to interference and lens aberration, which affect the display quality and viewing angle, particularly in glassless lenticular and barrier methods.
Innovation Solution
A stereoscopic image display device is designed with a lens array made of optically anisotropic material, a planarization layer of optically isotropic polymer, and a light shielding pattern that overlaps the boundary between lenses, directly integrated with a polarization control layer, reducing the substrate thickness and focal distance to enhance image quality and viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lens array structure is used, then the device can display stereoscopic images, but crosstalk and image distortion occur due to interference and lens aberration
Solution Approach 1:
The patent changes the optical parameters of the lens array by using optically anisotropic materials with specific refractive indices (nx>ny) and controlling the orientation of the optical axes. The optical axes of adjacent lenses are oriented at different angles (e.g., 0° and 90°) to reduce interference and aberration, thereby eliminating crosstalk and image distortion while maintaining stereoscopic display functionality.
2Ease of manufacture
If multiple separate layers are used for lens array and polarization control, then each layer can be optimized independently, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines the lens array layer and polarization control layer into a single integrated structure. The optically anisotropic material of the lens array inherently provides polarization control through its optical axis orientation, eliminating the need for separate polarization control layers and simplifying the manufacturing process while maintaining independent optimization capabilities.
3Strength
If optical bonding is used to attach lens array to polarization control layer, then the bonding strength is improved, but the manufacturing cost and process complexity increase
Solution Approach 1:
The patent extracts and eliminates the optical bonding process from the manufacturing sequence by integrating the lens array and polarization control functions into a single layer. This removes the need for separate bonding steps, reducing manufacturing cost and process complexity while the integrated structure maintains sufficient mechanical strength through its unified construction.
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 improves the display quality by reducing crosstalk and image distortion, widening the viewing angle, and simplifying the manufacturing process while lowering costs by eliminating the need for optical bonding between the lens array and polarization control layer.
Implementation Method 1
The lens array may refract light provided from the display panel to form a light field.
Implementation Method 2
a lens layer which includes an optically anisotropic material
Data Source
AI summary
A stereoscopic image display device including: a display panel including pixels; a lens array disposed on the display panel, wherein the lens array includes a lens layer which includes an optically anisotropic material, and a planarization layer which covers the lens layer and includes an optically isotropic polymer; and a light shielding pattern disposed on the lens array, and overlapping a boundary between lenses of the lens array.