Double-Sided Optical Lens for Multi-Directional LED Illumination

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Solution Overview

Problem

Conventional secondary optical lenses for LEDs can only guide light in one direction, limiting their application and requiring additional components for improved light distribution.

Innovation Solution

A double-sided optical lens with a free-form light incidence surface and micro-structural portions, allowing for both forward and backside illumination by refracting and reflecting light, respectively, to enhance light distribution and utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a conventional secondary optical lens is used to guide light in one direction, then the light distribution in that direction is improved, but the application scope is limited and additional components are required for multi-directional illumination

Engineering Contradiction:

Improvelight distributionVSAvoidapplication scope

Core Design Contradiction:

Illumination intensityVSAdaptability or versatility

Solution Approach 1:

The optical lens is designed with dual functionality: the first surface focuses light forward while the second surface with micro-structural portions redirects light backward. This multi-functional design allows a single component to achieve both forward and backward illumination, eliminating the need for additional optical components and expanding application scope to scenarios requiring multi-directional light distribution.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The optical lens is divided into distinct functional zones: the first surface for forward light guidance and the second surface with micro-structural portions for backward light redirection. This segmentation of functional responsibilities within a single component enables independent optimization of each surface's optical properties while achieving comprehensive multi-directional illumination coverage.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If a single-direction light guide lens is used, then the optical path is simple, but light utilization efficiency is reduced due to unidirectional emission only

Engineering Contradiction:

Improveoptical pathVSAvoidlight loss

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The optical lens ensures continuous useful action by capturing and redirecting light in both forward and backward directions simultaneously. The micro-structural portions on the second surface continuously redirect backward-propagating light, ensuring that light energy is utilized productively in multiple directions without interruption, thereby improving overall light utilization efficiency while maintaining optical path simplicity.

Inventive Principle:

Principle #20Continuity of useful action

3Illumination intensity

If additional optical components are added to achieve multi-directional light distribution, then the illumination coverage is improved, but the device complexity and cost increase

Engineering Contradiction:

Improveillumination coverageVSAvoidnumber of components

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The optical lens merges multiple optical functions into a single integrated component. The first surface performs forward light focusing while the second surface with micro-structural portions performs backward light redirection, combining what would traditionally require separate optical components into one unified element, thereby reducing device complexity and cost while achieving comprehensive multi-directional illumination coverage.

Inventive Principle:

Principle #5Merging (Combining)

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

Enables efficient light emission in multiple directions, improving light distribution and reducing losses, thereby expanding the application of LEDs beyond single-direction illumination.

Implementation Method 1

a light incidence surface... refracting light

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

micro-structural portions... reflecting light

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS10564435B2Optical lens, light guide member and double sided luminosity device

Publication Date: 2020.02.18 CHAMP TECH OPTICAL (FOSHAN) CORP

AI summary

A device emitting light from two sides includes a base, a first light emitting surface, and a second light emitting surface. The base comprises a first surface and a second surface, the first surface is depressed to form a receiving groove, the receiving groove comprising a light incidence surface. The first light emitting surface protrudes from the second surface. The second light emitting surface is arranged beside the receiving groove. The second light emitting surface is a micro-structural portion, the micro-structural portion recessed from the first surface towards the second surface and forming a plurality of micro-structures.