Lens Array with Prisms for Stereoscopic Crosstalk Reduction
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Solution Overview
Problem
Stereoscopic image display devices using glassless methods, such as lenticular and barrier methods, often experience crosstalk where viewpoints partially overlap, affecting the quality of the three-dimensional image displayed.
Innovation Solution
A lens array is designed with a base substrate and prisms/lenses arranged in specific directions and refractive indices, where the prisms and lenses have different refractive indices and internal angles, reducing crosstalk and expanding the viewing angle by controlling light refraction and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lenticular method using a cylindrical lens array is used to separate left and right eye images, then stereoscopic image display is achieved, but crosstalk occurs where viewpoints partially overlap
Solution Approach 1:
The lens array is segmented into multiple lens units, each corresponding to a specific viewpoint. Each lens unit is further divided into multiple regions that correspond to different sub-pixels, allowing precise control of light from each pixel to specific viewing directions. This segmentation prevents viewpoint overlap and eliminates crosstalk.
Solution Approach 2:
Different regions within each lens unit have different optical properties tailored to their specific function. The lens array provides different refraction characteristics for different spatial locations, with each local region optimized to direct light from corresponding sub-pixels to specific viewpoints, thereby preventing crosstalk while maintaining stereoscopic display quality.
2Adaptability or versatility
If traditional lenticular lens arrays are used, then glassless stereoscopic display is achieved, but the viewing angle is limited
Solution Approach 1:
The patent extends the traditional two-dimensional lenticular lens array into a three-dimensional light field structure. By arranging multiple lens units with different viewing directions and incorporating multiple sub-pixels per lens unit, the system creates a multi-dimensional viewing space that expands the effective viewing angle while maintaining proper image separation through the correspondence between sub-pixel positions and lens regions.
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 lens array effectively reduces crosstalk and enhances the viewing angle, providing a clearer and more natural stereoscopic image by optimizing light refraction and distribution, suitable for applications in light field displays and augmented reality.
Implementation Method 1
A lens array includes a base substrate and a plurality of prisms arranged in parallel to each other in a first direction on the base substrate, and a plurality of lenses covering the plurality of prisms... The base substrate and the plurality of prisms may have an identical first refractive index. The plurality of lenses may have a second refractive index that is less than the first refractive index.
Data Source
AI summary
A lens array includes a base substrate, a plurality of prisms arranged in parallel to each other in a first direction on the base substrate, and a plurality of lenses covering the plurality of prisms, and arranged parallel to each other in the first direction. Each of the prisms and each of the lenses extends in a second direction different from the first direction.