LED Module with Inclined Lateral Surface for Uniform Light Distribution
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Solution Overview
Problem
Existing LED lighting fixtures exhibit variation in luminous intensity due to directivity issues, leading to uneven brightness, and current solutions involving prisms increase complexity and cost.
Innovation Solution
Disposing light-emitting diodes on the lateral surface of a right cone or pyramid with an inclination angle between 55° and 82°, ensuring uniformity by aligning light-emitting surfaces parallel to the lateral surface and maintaining equal angles between projection lines on the bottom surface, thereby reducing luminous intensity variation without additional structural components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light-emitting diodes are two-dimensionally arranged on a flat printed circuit board, then the structure is simple and cost is low, but luminous intensity varies significantly in different directions causing uneven brightness
Solution Approach 1:
The patent transitions from two-dimensional arrangement of LEDs on a flat board to three-dimensional arrangement on the lateral surface of a cone or pyramid. This dimensional change allows LEDs to be positioned at optimized angles (55°-82° inclination) relative to the base, enabling uniform light distribution in multiple directions without requiring additional optical components like prisms, thus maintaining structural simplicity while improving luminous intensity uniformity
2Illumination intensity
If prisms are added to laterally refract light, then luminous intensity variation is reduced, but structural complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the need for additional optical components (prisms) by incorporating the light redirection function directly into the mounting structure's geometry. The conical or pyramidal shape with specifically angled lateral surfaces (55°-82° inclination) inherently performs the light redistribution function that would otherwise require separate prism components, thereby reducing structural complexity and cost while maintaining luminous intensity uniformity
Solution Approach 2:
The patent merges the mounting structure with the light distribution function. The lateral surface of the cone or pyramid serves dual purposes: mechanically supporting the LEDs and optically redirecting their emission through its inclined geometry. This integration eliminates the need for separate prism components, reducing both structural complexity and manufacturing cost while achieving uniform light 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
This configuration effectively suppresses luminous intensity variation and enhances brightness uniformity across all hemispherical directions at a lower cost, eliminating the need for prisms and maintaining efficiency.
Implementation Method 1
by disposing light-emitting diodes only on a lateral surface of a right cone, a right pyramid, a truncated right cone, or a truncated right pyramid... angles formed between projection lines of lines normal to light-emitting surfaces
Data Source
AI summary
An LED module according to the present invention is an LED module including a plurality of light-emitting diodes, wherein the plural light-emitting diodes are disposed only on a lateral surface of a right cone, a right pyramid, a truncated right cone, or a truncated right pyramid; the lateral surface has an inclination angle of 55° or more and 82° or less with respect to a bottom surface; the plural light-emitting diodes have light-emitting surfaces substantially parallel to the lateral surface; and angles formed between projection lines of lines normal to light-emitting surfaces of adjacent light-emitting diodes or adjacent ones of grouped light-emitting diodes, the projection lines being drawn on the bottom surface, are all equal to each other and are 72° or less.