Lighting Device with Segmented Housing and Optical Elements

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Solution Overview

Problem

Conventional lighting devices using light emitting diodes face challenges with unsatisfactory illumination distribution and high production costs due to the need for multiple light sources arranged on both sides of a substrate, leading to complex structures and increased costs.

Innovation Solution

A lighting device design featuring a substrate with light sources on one side and a housing with optical elements that transmit and reflect light to achieve omnidirectional distribution, allowing light to exit from both sides of the housing, thereby reducing production complexity and costs while enhancing light output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If multiple light sources are arranged on both sides of the substrate to provide omnidirectional lighting, then illumination distribution is improved, but production costs and device complexity increase

Engineering Contradiction:

Improveillumination distributionVSAvoiddevice complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The housing is divided into a first portion and a second portion, with optical elements selectively arranged in each portion. The first portion contains optical elements that reflect light towards the second portion, while the second portion contains optical elements that transmit light. This segmentation allows the system to achieve omnidirectional illumination using light sources arranged on only one side of the substrate, thereby reducing device complexity while maintaining illumination distribution quality.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If multiple light sources are arranged on both sides of the substrate to provide omnidirectional lighting, then illumination distribution is improved, but production costs increase

Engineering Contradiction:

Improveillumination distributionVSAvoidproduction costs

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

3Illumination intensity

If multiple light sources are arranged on both sides of the substrate to provide omnidirectional lighting, then illumination distribution is improved, but the number of components increases

Engineering Contradiction:

Improveillumination distributionVSAvoidnumber of components

Core Design Contradiction:

Illumination intensityVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If light sources are arranged on only one side of the substrate, then production simplicity and cost efficiency are improved, but illumination distribution is limited

Engineering Contradiction:

Improveproduction simplicityVSAvoidillumination distribution

Core Design Contradiction:

Ease of manufactureVSIllumination intensity

Solution Approach 1:

Optical elements are arranged in the first portion of the housing to act as intermediaries between the light sources and the second portion. These optical elements reflect light from the light sources (arranged on one side of the substrate) towards the second portion, enabling the light to exit the housing in multiple directions. This intermediary mechanism allows omnidirectional illumination distribution while maintaining the simplicity of having light sources on only one side of the substrate.

Inventive Principle:

Principle #24Intermediary (Mediator)

5Ease of manufacture

If light sources are arranged on only one side of the substrate, then production simplicity and cost efficiency are improved, but light output distribution is limited

Engineering Contradiction:

Improveproduction simplicityVSAvoidlight output distribution

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

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 provides a cost-efficient, simple production process for lighting devices with improved light distribution, covering a larger area with fewer components, and achieving a more balanced and uniform omnidirectional light output by reflecting and transmitting light from a single side of the substrate.

Implementation Method 1

The plurality of first optical elements are arranged substantially opposite the output direction of the plurality of light sources along the first portion of the housing facing the first side of the substrate. The substrate is adapted to allow transmission of light. The plurality of first optical elements is arranged to transmit part of the light emitted by the light sources

Methodology Applied

Scientific EffectLight transmission: Light

Implementation Method 2

The plurality of first optical elements is arranged to reflect part of the light emitted by the light sources through the substrate towards the second portion of the housing

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 3

The housing of a light transmissive material surrounding the substrate is arranged to transmit light

Methodology Applied

Scientific EffectLight transmission: Light

Data Source

PatentUS10655790B2Lighting device

Publication Date: 2020.05.19 SIGNIFY HOLDING BV

AI summary

A lighting device (1, 11, 21) comprising a substrate (4, 14, 24), a plurality of light sources (3, 13, 23), and a housing (2, 12, 22) of a light transmissive material. The substrate has a first side (4a, 14a, 24a) and a second side (4b, 14b, 24b) and the plurality of light sources are arranged on the first side of the substrate. The light sources have a common general output direction. The housing is arranged to transmit light surrounding the substrate, having a first portion (2a, 12a, 22a) of said housing and a second portion (2b, 12b, 23b) of the housing arranged substantially opposite the first portion with respect to the substrate. The plurality of first optical elements (6, 16, 26) may be arranged substantially opposite the output direction of the plurality of light sources along the first portion of the housing facing the first side of the substrate. The substrate is adapted to allow transmission of light. The plurality of first optical elements are arranged to transmit part of the light emitted by the light sources and reflect part of the light emitted by the light sources through the substrate towards the second portion of the housing.