Lens with Concave Bottom Hole for LED Light Distribution

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Solution Overview

Problem

Conventional light source designs using LEDs suffer from uneven light distribution, resulting in ring-shaped areas of strong light and heat dissipation issues due to the complete coverage of the light-emitting diode chip within a cavity.

Innovation Solution

A light source device featuring a lens with a concave bottom surface and a hole formed by inner wall surfaces, allowing light to be emitted into the hole through an opening, which covers the projection area of the illumination, and includes a substrate for heat dissipation, improving light distribution and reducing heat retention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the light-emitting diode chip is completely covered within the cavity formed by the lens, then the light emission angle is determined by the outer surface of the lens, but heat dissipation problems occur

Engineering Contradiction:

Improvelight emission angleVSAvoidheat dissipation

Core Design Contradiction:

Illumination intensityVSTemperature

Solution Approach 1:

The invention divides the lens structure into two functional zones: an upper cavity portion that determines light emission angle and an lower opening portion that enables heat dissipation. The lens includes a first surface with a first region (cavity) and a second region (opening), allowing simultaneous achievement of light control and thermal management functions.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If the light-emitting diode chip is completely covered within the cavity, then the light distribution forms ring shaped areas of strong light, but the light will not be smooth

Engineering Contradiction:

Improvelight distributionVSAvoidlight smoothness

Core Design Contradiction:

Illumination intensityVSStability of the object's composition

Solution Approach 1:

The invention applies different structural characteristics to different regions of the lens. The first region provides cavity structure for light direction control, while the second region provides opening structure for smooth light distribution. This local differentiation eliminates ring-shaped strong light areas and achieves uniform illumination.

Inventive Principle:

Principle #3Local quality

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 design achieves a more even light distribution and enhanced heat dissipation, eliminating dark circles and bright spots, resulting in a smoother light emission pattern and improved illumination area coverage.

Implementation Method 1

The light emitting from the illumination area may be completely or substantially emitted into the hole through the opening

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 2

includes a substrate for heat dissipation

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS9134007B2Light source device

Publication Date: 2015.09.15 DARWIN PRECISIONS CORP

AI summary

A light source device includes a lens and a light source disposed under the lens. The lens has a light-emitting top surface and a bottom surface opposite to the light-emitting top surface. The bottom surface concaves towards the light-emitting top surface to form a hole and has a gouge surrounding the hole with an inclination towards the edge of the hole. The hole is formed from the surrounding of a first inner wall surface and a second inner wall surface. The light source is disposed below the bottom surface and corresponds to the hole.