Optical System Light Guide Uniform Luminance
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Solution Overview
Problem
Existing image display systems, such as head-up displays in automobiles, often suffer from uneven brightness of the images projected, leading to suboptimal visual recognition for users.
Innovation Solution
An optical system comprising a light guide member, prisms, and multiple light control bodies that control light rays by integrating incident lenses to manage the optical axes, ensuring uniform luminance distribution across the emission surface, thereby enhancing image brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional single light source and simple optical path are used, then the device complexity is low, but the brightness uniformity of the projected image deteriorates
Solution Approach 1:
The patent divides the optical system into multiple independent light control bodies, each handling a specific angular range of light rays. This segmentation allows precise control over light distribution from different angles, achieving uniform brightness across the emission surface while maintaining manageable system complexity through modular design
Solution Approach 2:
Each light control body is designed with specific optical properties tailored to control light rays from particular angular ranges. The incident lenses and light guide structures are optimized locally for their specific functional requirements, enabling precise brightness control in different spatial zones while contributing to overall system performance
2Manufacturing precision
If multiple light control bodies with different optical axis directions are introduced, then the brightness uniformity is improved, but the device complexity increases
Solution Approach 1:
Multiple light control bodies are integrated into a single light guide member structure, merging their functions while maintaining their individual optical control capabilities. This combining approach reduces the overall number of separate components and simplifies the system architecture while preserving the brightness uniformity benefits of multiple optical paths
Solution Approach 2:
The light guide member serves multiple functions simultaneously: it guides light from multiple sources, controls light distribution for different angular ranges, and integrates multiple light control bodies into a unified structure. This multi-functionality reduces the need for separate components and simplifies the overall system while achieving uniform luminance distribution
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 reduces brightness unevenness in the images projected, providing users with a more consistent and clear visual experience by controlling the directions of optical axes and luminance distribution.
Implementation Method 1
The prism is provided on the first surface and reflects light passing through the light guide member toward the second surface
Implementation Method 2
Each of the plurality of light control bodies includes an incident lens. Each of the plurality of light control bodies causes the light incident on the incident lens from the light source to be incident on the incident surface
Data Source
AI summary
An optical system includes a light guide member, a prism, and a plurality of light control bodies. The light guide member includes an incident surface on which light is incident, and a first surface and a second surface facing each other. In the light guide member, the second surface is an emission surface of light. The prism is provided on the first surface and reflects light passing through the light guide member toward the second surface. The plurality of light control bodies are positioned between light sources and the incident surface. The plurality of light control bodies control light rays output from the light sources and incident on the incident surface. Each of the plurality of light control bodies includes an incident lens. Each of the plurality of light control bodies causes the light incident on the incident lens from the light source to be incident on the incident surface.