Light Guide Plate Optics for Wide-Angle Stereoscopic Images
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Solution Overview
Problem
Existing image display devices struggle to maintain the visibility of stereoscopic images within a wide viewing angle area, as the images become distorted and less three-dimensional when viewed from angles greater than 60° due to increased spread sensitivity and blurring.
Innovation Solution
A light guide plate with optical-path deflectors that change the optical path of light from multiple light sources to form images within specific angle ranges, allowing the images to be perceived from a wider angle without distortion, by separating or overlapping these angle ranges to prevent blurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light source is used to form a stereoscopic image, then the device structure is simple, but the viewing angle is limited to within 60° and image distortion occurs in wide viewing angle areas
Solution Approach 1:
The patent divides the single light source into multiple light sources (first light source and second light source) positioned at different locations. Each light source is assigned to form images in specific angle ranges, thereby expanding the overall viewing angle while maintaining manageable device complexity through modular segmentation.
Solution Approach 2:
The patent transitions from a single-point light source configuration to a multi-point spatial distribution of light sources. By positioning light sources at different locations and assigning them different angular ranges, the solution adds a spatial dimension to the light source configuration, enabling wide-angle viewing without excessive complexity.
2Adaptability or versatility
If multiple light sources are used to expand viewing angle, then the viewing angle range increases, but the device structure becomes more complex
Solution Approach 1:
The patent assigns different functional characteristics to different light sources based on their positions. The first light source forms images in a first angle range while the second light source forms images in a second angle range. This local differentiation allows each light source to be optimized for its specific angular sector, achieving wide viewing angle coverage without requiring all light sources to be identical or overly complex.
3Adaptability or versatility
If light is emitted at wide angles, then the viewing angle increases, but spread sensitivity increases causing image blurring and distortion
Solution Approach 1:
The patent segments the angular range into multiple non-overlapping or partially overlapping angle ranges, with each light source responsible for a specific segment. This segmentation prevents the spread sensitivity issue from affecting the entire viewing angle simultaneously, as each light source operates within a controlled angular sector where image clarity can be maintained.
Solution Approach 2:
The patent changes the operational parameters (angular ranges) for different light sources based on their positions. By adjusting which angle ranges each light source covers, the system optimizes image quality for each sector while collectively achieving wide viewing angle coverage, effectively managing the trade-off between viewing angle and image clarity.
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 prevents the deterioration of stereoscopic image visibility in wide viewing angle areas, ensuring the images remain clear and three-dimensional across a broader range of viewing angles.
Implementation Method 1
a group of optical-path deflectors that change the optical path of the light, the group of optical-path deflectors deflecting the light incident on the light guide plate from a first light source
Implementation Method 2
the plurality of the first and second prisms reflect light from the light source 101 to thereby present a left-eye image and a right-eye image
Implementation Method 3
Light guide plate, configured to guide light incident thereon, change the optical path of the light guided, and emit the light from an emission surface
Data Source
AI summary
An optical device includes: a light guide plate having a group of optical-path deflectors configured to change the optical path of light from a first light source to form an image in the space within a first angle range, and change the optical path of light from a second light source to form an image in the space within a second angle range, wherein the first angle range and the second angle range are separated from each other or adjoining each other.