Light Guide Microstructure Geometry for Oblique Viewing Angles
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Solution Overview
Problem
Conventional stereoscopic image display devices fail to provide high-quality stereo images when viewed from oblique angles due to inadequate design of the light guide element.
Innovation Solution
A stereoscopic image display device incorporating a flat panel display unit, a lens array unit, and a light guide structure unit with specifically designed light guide microstructures that have a bottom angle between 15.5 degrees and 83.5 degrees and a bottom length between 10 micrometers and 2,000 micrometers, allowing for an oblique viewing angle between 10 degrees and 60 degrees, optimizing image quality at various angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional light guide element is used in a stereoscopic image display device, then the device can display stereo images, but the image quality degrades when viewed from oblique angles
Solution Approach 1:
The patent applies parameter changes by optimizing the geometric parameters of the light guide microstructures (bottom angle B between 15.5-83.5 degrees and bottom length P between 10-2,000 micrometers). This allows the light guide element to effectively guide light across a broader viewing angle range (10-60 degrees) while maintaining image quality, resolving the contradiction between reliable stereo image display and adaptability to oblique viewing angles
Solution Approach 2:
The patent implements local quality by designing light guide microstructures with specific geometric characteristics (prism structures with controlled bottom angles and lengths) at particular locations within the light guide element. These localized optimized structures enable effective light guidance for oblique viewing angles without compromising the overall image quality across the display
2Adaptability or versatility
If the bottom angle and bottom length of light guide microstructures are optimized for broader viewing angles, then oblique viewing quality improves, but the design complexity increases
Solution Approach 1:
The patent resolves design complexity by establishing clear parameter ranges for the light guide microstructures (bottom angle B: 15.5-83.5 degrees, bottom length P: 10-2,000 micrometers). These standardized parameter specifications simplify the design process while achieving the desired oblique viewing angle performance (10-60 degrees), transforming a complex design problem into a controlled parameter optimization
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
Enables users to view high-quality stereo images from a broader range of oblique viewing angles, preventing image degradation at angles that are too small or too large, thereby enhancing the overall image quality and user experience.
Implementation Method 1
a bottom angle of the at least one light guide microstructure is defined as B... the bottom angle B and the bottom length P of the at least one light guide microstructure satisfies following conditions... such that an oblique viewing angle of the stereoscopic image display device falls within a range from 10 degrees to 60 degrees
Implementation Method 2
The light guide structure unit includes at least one light guide microstructure... such that an oblique viewing angle of the stereoscopic image display device falls within a range from 10 degrees to 60 degrees
Data Source
AI summary
A stereoscopic image display device includes a flat panel display unit, a lens array unit, and a light guide structure unit. The light guide structure unit includes a light guide microstructure. The light guide microstructure is disposed on a side of the lens array unit. A bottom angle of the light guide microstructure is defined as B, and a bottom length of the light guide microstructure is defined as P. The bottom angle B and the bottom length P of the light guide microstructure satisfies following conditions: (i) 15.5 degrees≤B≤83.5 degrees; and (ii) 10 micrometers≤P≤2,000 micrometers, such that an oblique viewing angle of the stereoscopic image display device falls within a range from 10 degrees to 60 degrees.