Indirect LED Lighting with Curved Heat Sink and Reflector

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Solution Overview

Problem

Conventional LED lighting devices often suffer from intense light emission, which can be harsh on users' eyes and lack effective heat radiation and light distribution capabilities, leading to suboptimal performance in terms of heat management and light diffusion.

Innovation Solution

A lighting device design featuring a heat sink with a curved lateral surface, a reflector, and a light source module with a flexible substrate, where the heat sink includes a receiver and an extension part for enhanced heat radiation, and the reflector is shaped to cover the member with a recess for the light source module, optimizing heat dissipation and light distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If direct lighting is used to emit light from LED, then light emission efficiency is improved, but light intensity becomes too strong causing eye discomfort

Engineering Contradiction:

Improvelight emission efficiencyVSAvoidlight intensity causing eye discomfort

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

A reflector is introduced as an intermediary component between the LED light source and the environment. The reflector redirects light that would otherwise be emitted directly, transforming the lighting pattern from direct to indirect illumination. This mediator component enables the system to maintain high light emission efficiency while reducing direct light intensity that causes eye discomfort.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of emitting light directly forward as conventional LED lighting does, this invention inverts the light emission approach by using the reflector to redirect light in alternative directions. The lighting path is reversed from direct emission to indirect reflection, achieving comfortable illumination levels while preserving energy efficiency.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of manufacture

If conventional heat sink structure is used, then manufacturing simplicity is maintained, but heat radiation performance is insufficient

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidheat radiation performance

Core Design Contradiction:

Ease of manufactureVSTemperature

Solution Approach 1:

The heat sink member features a curved lateral surface instead of a conventional flat or simple geometric shape. This curvature increases the surface area available for heat radiation while maintaining a compact form factor. The curved geometry also improves heat distribution across the heat sink surface, enhancing overall heat radiation performance without significantly complicating the manufacturing process.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Device complexity

If light source module is exposed without reflector, then structural simplicity is maintained, but light distribution is not omnidirectional and glare occurs

Engineering Contradiction:

Improvestructural simplicityVSAvoidlight distribution uniformity

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

The reflector component adds a new dimensional aspect to light distribution by introducing reflective surfaces at various angles. This enables light to be redirected in multiple directions (omnidirectional distribution) rather than following a simple linear path. The reflector transforms the lighting geometry from one-dimensional direct emission to multi-dimensional indirect reflection, achieving uniform light distribution while managing structural complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 improved heat radiation performance, omni-directional light distribution, and reduced glare, while preventing electrical contact between the light source module and heat sink, thereby enhancing user comfort and manufacturing workability.

Implementation Method 1

a heat sink which includes a base and a member extending from the base

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 2

an indirect lighting apparatus emits light emitted from the LED by changing the path of the light through reflecting means

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUSRE47425E1Lighting device having reflectors for indirect light emission

Publication Date: 2019.06.04 SUZHOU LEKIN SEMICON CO LTD

AI summary

A lighting device may be provided that includes: a heat sink which includes a base and a member extending from the base; a light source module which is disposed on a lateral surface of the member; and a reflector which is disposed on the member and has a disposition recess exposing the light source module, wherein the at least two light source modules are provided and the light source module includes a terminal plate which electrically connects the at least two light source modules, and wherein the terminal plate is disposed on the reflector.