Light Guide Plate Optical Path Changer Image Contrast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing stereoscopic image display devices using light guide plates experience noticeable contrast deterioration and blurring, particularly at distant imaging positions, which affects the quality of the formed image.
Innovation Solution
A light guide plate device with an incident surface and optical path changers on its back surface, where the optical path changers reflect light to form a plane image with a near imaging portion close to the back surface, reducing contrast deterioration and blurring by limiting the distance of the near imaging portion to 25% or less of the distance to the most distant imaging position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light is guided to distant imaging positions in a light guide plate device, then the imaging space is expanded, but contrast deterioration and blurring become more noticeable
Solution Approach 1:
The imaging space is segmented into a near imaging portion and a distant imaging portion based on distance from the back surface. The optical path changers are configured to direct light to these different portions, allowing the near portion to maintain high image quality while the distant portion provides extended imaging space.
Solution Approach 2:
Different regions of the imaging space are assigned different quality characteristics. The near imaging portion is optimized for high contrast and minimal blurring by positioning it within a predetermined distance from the back surface, while the distant imaging portion accepts greater degradation in exchange for expanded imaging volume.
2Length of moving object
If the imaging position is placed farther from the back surface, then the imaging depth is increased, but contrast deterioration and blurring are more noticeable
Solution Approach 1:
The imaging depth is segmented into near and distant portions. The near imaging portion is positioned within a predetermined distance from the back surface to maintain high image quality, while the distant imaging portion extends beyond this distance to provide increased overall imaging depth.
3Productivity
If optical path changers are arranged on the back surface to reflect light, then light guidance efficiency is improved, but contrast deterioration occurs at the ends of the cross section
Solution Approach 1:
The optical path changers are configured with specific reflective properties at different locations. The ends of the cross section perpendicular to the back surface are positioned within the near imaging portion where light guidance is optimized to minimize contrast deterioration, while maintaining overall high light guidance efficiency through the optical path changer arrangement.
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 minimizes noticeable contrast deterioration and blurring in the formed image, particularly at the ends of the cross section perpendicular to the back surface, enhancing image quality by ensuring the near imaging portion includes the two ends within a predetermined distance from the emission surface.
Implementation Method 1
The optical path changer reflects light incident through the incident surface and guided to be emitted through an emission surface parallel to the back surface
Data Source
AI summary
A light guide plate according to one or more embodiments may include an incident surface that receives light, and an optical path changer on a back surface perpendicular to the incident surface. The optical path changer may reflect light to be emitted through an emission surface parallel to the back surface. The light emitted through the emission surface may form a formed image including a plane image representing a surface. The plane image may include a near imaging portion and a distant imaging portion. The plane image may have two ends included in the near imaging portion in a cross section perpendicular to the back surface and an optical axis of a light source.