Textured Light Distributor for Uniform Illumination
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Solution Overview
Problem
Existing lighting technologies do not effectively capture and distribute light beyond the critical angle of incidence, leading to inefficient illumination patterns and reduced brightness.
Innovation Solution
A light distributor with a textured surface is used, where the light source is positioned to impinge light on the surface at angles greater than the critical angle, and a reflector is employed to direct additional light onto the textured surface, enhancing light capture and distribution through scattering and refraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a smooth surface is used for light distribution, then the structure is simple and manufacturing is easy, but light capture efficiency beyond the critical angle is poor and illumination intensity is reduced
Solution Approach 1:
The light distributor employs different surface qualities in different regions: a textured surface in the light receiving area to enhance light capture beyond the critical angle, and a smooth surface in the light emitting area to maintain optical clarity and distribution uniformity. This localized differentiation resolves the contradiction by applying complexity only where needed for improved light capture.
Solution Approach 2:
The light distributor is divided into distinct functional zones: a textured light receiving surface segment for capturing oblique light rays and a smooth light emitting surface segment for uniform light distribution. This segmentation allows each zone to be optimized independently, improving overall light capture efficiency without compromising the simplicity of the overall structure.
2Illumination intensity
If light source is positioned to illuminate the textured surface at high angles, then light capture beyond critical angle is improved, but the arrangement complexity increases
Solution Approach 1:
The light source assembly is merged with the textured surface structure, positioning the light source directly adjacent to and oriented toward the textured area. This integration simplifies the overall arrangement by combining the light generation and light capture functions into a unified assembly, reducing the complexity of separate positioning mechanisms.
Solution Approach 2:
The light source is positioned at an angle relative to the textured surface, utilizing angular orientation to capture light beyond the critical angle. The textured surface itself has a curved or angled configuration that naturally directs light toward the emitting area, simplifying the need for complex positioning mechanisms.
3Illumination intensity
If a reflector is added to direct light onto the textured surface, then light capture efficiency is improved, but device complexity increases
Solution Approach 1:
The textured surface serves multiple functions simultaneously: it acts as both the light receiving surface and the light distributing surface. By integrating these functions into a single component, the need for separate reflectors and light distributors is eliminated, reducing device complexity while maintaining high light capture efficiency.
Solution Approach 2:
The textured surface is designed to perform its own light capture and distribution functions without requiring additional reflectors or auxiliary components. The surface geometry itself directs and distributes light, making the system self-sufficient and reducing the overall component quantity.
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 textured surface captures and scatters light beyond the critical angle, increasing the amount of light emitted normally and improving illumination patterns, resulting in brighter and more uniform light distribution.
Implementation Method 1
The textured surface captures and scatters light beyond the critical angle, increasing the amount of light emitted normally
Implementation Method 2
light impinges on the first surface at an angle greater than the critical angle
Implementation Method 3
The textured surface captures and scatters light beyond the critical angle, increasing the amount of light emitted normally
Data Source
AI summary
A light distributor includes a panel (202) having a textured surface (206) and a light distribution surface. A number of LEDs (204) are located in proximity to the textured surface. Some of the light (208, 212) impinging on the textured surface (206) is refracted or reflected (214, 216) into the panel (202) from where it can be transmitted through the distribution surface.