Glare Suppression Component with Serrated Light Control Structure
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Solution Overview
Problem
Existing light control devices, such as those used in head-up displays, may fail to prevent specular reflections from reaching the eye-box at specific angles, leading to glare.
Innovation Solution
A component with a first serrated structure is introduced, featuring active and passive faces with a first layer on the passive faces that includes structural features to suppress specular reflections, ensuring no angles allow internal specular reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional light control device is used, then the device structure is simple, but specular reflections from the reflective surface can reach the eye-box at specific angles causing glare
Solution Approach 1:
The light control device is divided into multiple functional layers: a first light control layer with a serrated structure containing active and passive faces, and a second light control layer with absorptive material. This segmentation allows each layer to perform a specific function - the first layer redirects light away from the eye-box while the second layer absorbs any remaining specular reflections, collectively eliminating glare without requiring excessive structural complexity
Solution Approach 2:
The passive faces in the serrated structure act as intermediary elements between the active faces and the reflective surface. These passive faces are specifically positioned and oriented to intercept and redirect specular reflections that would otherwise reach the eye-box, serving as a mediating structure that prevents harmful light paths while maintaining the overall device simplicity
2Object-affected harmful factors
If the serrated structure is designed to redirect light, then glare is reduced, but internal specular reflections can still occur at specific angles
Solution Approach 1:
Different regions of the light control device are assigned different optical properties: the active faces of the serrated structure are designed with specific orientations to redirect light, while the passive faces are positioned to intercept internal reflections. The second light control layer incorporates absorptive material specifically in regions where internal specular reflections are most likely to occur, creating local quality variations that ensure comprehensive glare suppression across all angles
Solution Approach 2:
The device converts potentially harmful internal specular reflections into beneficial diffuse reflections or absorbed energy. The serrated structure redirects internal reflections away from the eye-box, and the absorptive material in the second layer captures any remaining reflected light, transforming what would be harmful glare into useful light management that enhances overall display visibility
3Object-affected harmful factors
If a light control layer with serrated structure is added, then specular reflection is suppressed, but the device complexity increases
Solution Approach 1:
The light control device merges multiple functions into a compact multi-layer structure. The serrated first light control layer combines light redirection functionality with a space-efficient design, while the second light control layer integrates absorptive properties. This merging of functions into a unified multi-layer architecture achieves comprehensive specular reflection suppression without requiring separate, bulky components for each function
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 eliminates the source of glare by diffusely scattering or absorbing ambient light, ensuring no specular reflections reach the target area, even at specific angles.
Implementation Method 1
The first layer has at least one structural feature, optionally a plurality of structural features, configured to suppress the specular reflection of ambient light incident thereon
Data Source
AI summary
There is provided a component for a light control device. The component comprises a first serrated structure. The first serrated structure has an array of active faces and a respective array of passive faces. Each passive face comprises a first layer having at least one structural feature configured to suppress the specular reflection of ambient light incident thereon.