Light-Guiding Plate Angular Control for Continuous Image Projection
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Solution Overview
Problem
Existing optical devices with light-guiding plates face issues in forming desired images when there are angular differences between regions, leading to discontinuous or undesired image projections.
Innovation Solution
The optical device incorporates a light-guiding plate with distinct first and second regions, each containing light convergence portions that emit light at different angles, allowing for the formation of continuous images by adjusting the angular differences between these regions and optimizing the optical surfaces to achieve uniform luminosity and continuous image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light-guiding plate has regions with angular differences to control light emission angles, then stereoscopic image formation is enabled, but image continuity and uniformity deteriorate
Solution Approach 1:
The light-guiding plate is divided into multiple regions (first region and second region) with different angular characteristics. Each region contains light convergence portions that emit light at specific angles, allowing independent control of light paths while maintaining overall image continuity through proper region transitions.
Solution Approach 2:
Different regions of the light-guiding plate are assigned different angular properties to suit their specific functions. The first region emits light at a first angle while the second region emits light at a second angle, creating local optimization for stereoscopic display while maintaining global image coherence.
2Manufacturing precision
If light convergence portions are added to control light angles, then image projection quality improves, but device complexity increases
Solution Approach 1:
The light convergence portions are integrated directly into the light-guiding plate structure rather than being separate components. This merging of functions reduces the number of parts while achieving precise light angle control, thereby improving image projection quality without proportionally increasing device complexity.
Solution Approach 2:
The light-guiding plate serves multiple functions: it guides light, creates angular differences for stereoscopic display, and incorporates light convergence portions for precise light control. This multi-functionality reduces the need for additional separate components, managing complexity while improving projection quality.
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 solution enables the formation of continuous and desired stereoscopic images by managing the angular differences between light-guiding plate regions, ensuring consistent image quality and brightness across the projection area.
Implementation Method 1
a light-guiding plate that guides light in a plane parallel to an emission surface that emits light
Implementation Method 2
each have optical surfaces that cause light to be emitted from the emission surface in directions in which the light substantially converges at one convergence point or one convergence line in a space, or substantially scatters from one convergence point or one convergence line in the space
Data Source
AI summary
A light-guiding plate of an optical device has first light convergence portions and second light convergence portions. The light convergence portions each have optical surfaces that cause light to be emitted from an emission surface in directions in which the light substantially converges at or scatters from one convergence point or one convergence line, the convergence points or lines for the light convergence portions are different from each other, first and second images are formed by a collection of the convergence points or lines of the first and second light convergence portions, respectively, and in a case where an image is projected to a plane perpendicular to the emission surface and parallel to a light-guiding direction of the light-guiding plate, the first and second light convergence portions cause light to be emitted from the emission surface at a first angle and at a second angle, respectively.