Light Refraction Member Structure for HUD Light Extraction Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies face challenges in efficiently controlling and distributing light emission, particularly in applications like vehicle HUD systems, where light distribution and extraction efficiency are suboptimal, leading to reduced visibility and increased light leakage.
Innovation Solution
A light refraction member with refractors arranged in a specific configuration to control light distribution, integrated with a light guide member and prisms, enhances light extraction efficiency by refracting and directing light in a controlled manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional light guide members are used in HUD systems, then the structure is simple, but light extraction efficiency is low and light distribution is poor
Solution Approach 1:
The light guide member is divided into multiple functional zones: a light incident region with first refractors for initial light entry, a light propagation region with second refractors for light distribution, and a light emitting region with third refractors for final light extraction. This segmentation allows each region to be optimized for its specific function, improving overall light extraction efficiency while maintaining a unified structural approach.
Solution Approach 2:
Different regions of the light guide member are assigned different refractor configurations and optical properties. The first refractors in the incident region have different shapes and orientations compared to the second refractors in the propagation region and third refractors in the emitting region. This local differentiation optimizes light extraction at each stage while maintaining overall structural coherence.
2Illumination intensity
If conventional light distribution methods are used, then the system is simple, but light leakage increases and visibility decreases
Solution Approach 1:
The refractors are configured with varying orientations and shapes that dynamically control light propagation paths. The second refractors in the propagation region are specifically oriented to redirect light toward the emitting region while preventing lateral leakage. This dynamic light control through geometric configuration improves visibility and reduces unwanted light distribution without requiring additional shielding components.
Solution Approach 2:
The light guide member acts as an intermediary between the light source and the display region. The multiple refractor systems within the light guide member progressively control and redirect light from the incident region through the propagation region to the emitting region. This intermediary control mechanism ensures efficient light transfer while minimizing leakage, improving image visibility without direct exposure from the light source.
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
Improves light extraction efficiency and distribution, reducing light leakage and enhancing the visibility of projected images, particularly in vehicle HUD systems.
Implementation Method 1
a plurality of refractors that refract the planar light
Data Source
AI summary
A light refraction member includes an incident surface on which planar light is incident, a plurality of refractors that refract the planar light, and an emitting surface from which the planar light refracted by the plurality of refractors is emitted as emitted light. The plurality of refractors are provided side by side in a first direction on at least one of the incident surface and the emitting surface, and each of the plurality of refractors has an area in which a direction in which the planar light is refracted changes along a second direction intersecting the first direction.