Light Guide Plate Optical Path Changer Viewpoint Distortion
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Solution Overview
Problem
Existing stereoscopic image display devices using light guide plates suffer from design deterioration when the viewpoint deviates from the expected direction parallel to the light incidence direction, leading to image distortion.
Innovation Solution
A light guide plate device with an incident surface and optical path changers on its back surface, which reflect light to form near and distant images, where the near image has a larger area and less distortion when the viewpoint changes in the direction parallel to the light incidence, reducing design deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If light guide plate uses conventional light convergence members with single convergence point or line, then stereoscopic image can be formed in predetermined angle range perpendicular to light incidence direction, but image distortion occurs when viewpoint deviates from expected direction parallel to light incidence direction
Solution Approach 1:
The patent divides the light convergence function into multiple independent optical path changers, each responsible for a specific convergence point or line. This segmentation allows each optical path changer to be optimized for its specific function while collectively forming the complete stereoscopic image, reducing overall distortion.
Solution Approach 2:
Each optical path changer is designed with specific local properties tailored to its convergence point or line. The optical path changers have different shapes, sizes, and orientations optimized for their respective positions, allowing each local region to maintain optimal image quality while the whole system achieves broad viewing angles.
2Device complexity
If stereoscopic image display device uses fixed optical path configuration, then design remains simple in predetermined angle range, but design deterioration occurs when viewpoint changes parallel to light incidence direction
Solution Approach 1:
The patent creates a dynamic optical path system where light can converge at multiple different points and lines simultaneously through the array of optical path changers. This dynamic capability allows the system to adapt to different viewpoint directions without changing the physical configuration of the light guide plate itself.
Solution Approach 2:
The optical path changers serve multiple functions: they act as both light converging elements and viewpoint adaptation elements. Each optical path changer can handle light from different incident angles and redirect it to the appropriate convergence point, making the system universally adaptable to various viewing conditions.
3Illumination intensity
If light convergence members are arranged to form stereoscopic image, then image can be viewed in predetermined angle range, but image area and luminance decrease when viewed from different viewpoints
Solution Approach 1:
The patent transitions from a two-dimensional light guide plate to a three-dimensional optical path system by introducing optical path changers that create convergence points in space. This dimensional change allows light to be concentrated more effectively, increasing luminance and image area while maintaining the ability to view from multiple angles.
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 device maintains image quality and reduces visible distortion by ensuring the near formed image has a larger area and higher luminance, allowing for a broader viewing angle with less noticeable design deterioration.
Implementation Method 1
The at least one 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. Light reflected by the optical path changer forms a stereoscopic image including a near formed image at an imaging position within a predetermined distance from the back surface and a distant formed image at another imaging position. The near formed image includes an image formation area with a larger total area than an image formation area of the distant formed image.