LED Lighting Device with Segmented Optical Plate and Reflective Sheet
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Solution Overview
Problem
Indirect lighting devices using LEDs often face challenges in effectively diffusing light and reducing glare, leading to suboptimal user comfort and efficiency compared to direct lighting systems.
Innovation Solution
The proposed lighting device incorporates a cylindrical housing with a reflective sheet and an optical plate coated with diffusing agents, including fluorescent materials, to scatter and convert light emitted from LEDs, enhancing light diffusion and reducing glare through a combination of reflective surfaces and a heat sink for efficient heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If indirect lighting is used to reduce glare and protect eyes, then user comfort is improved, but light diffusion effectiveness is insufficient leading to reduced user efficiency
Solution Approach 1:
The optical plate is divided into multiple regions with different optical properties: a first region with a first refractive index and a second region with a second refractive index. This segmentation allows different parts of the light to be redirected at different angles, achieving both glare reduction and maintained visibility for user efficiency.
Solution Approach 2:
Different regions of the optical plate are assigned different local optical qualities (different refractive indices) to perform different functions. The first region handles specific light redirection while the second region handles other light paths, optimizing both comfort and efficiency simultaneously.
2Use of energy by moving object
If LED is used for high conversion efficiency and low power consumption, then energy efficiency is improved, but heat generation requires effective heat management
Solution Approach 1:
A reflective sheet is introduced as an intermediary element between the LED light source and the optical plate. This reflective sheet redirects light that would otherwise be absorbed by the heat sink, improving overall light extraction efficiency while reducing the heat management burden on the heat sink structure.
3Illumination intensity
If reflective sheet is added to improve light extraction, then light diffusion is enhanced, but device complexity increases
Solution Approach 1:
The reflective sheet is integrated with the heat sink structure, merging two functional elements (light reflection and heat dissipation) into a single unified component. This reduces device complexity by eliminating separate parts while maintaining enhanced light extraction efficiency.
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 improves light diffusion and reduces glare, enhancing user comfort and efficiency by providing a more uniform and natural light output while maintaining the energy efficiency and longevity benefits of LED technology.
Implementation Method 1
The indirect lighting apparatus emits light emitted from the LED by changing the path of the light through reflecting means and so on
Implementation Method 2
The proposed lighting device incorporates a cylindrical housing with a reflective sheet
Implementation Method 3
an optical plate coated with diffusing agents, including fluorescent materials, to scatter and convert light
Implementation Method 4
an optical plate coated with diffusing agents, including fluorescent materials, to scatter and convert light
Implementation Method 5
a heat sink for efficient heat management
Data Source
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AI summary
A lighting device may be provided that includes: a heat sink (600) which includes a base (610) and a projection (630) extending from the base and having one side; a light source (400) which includes a substrate (410) disposed on the one side of the projection and a light emitting device (430) disposed on the substrate (410); an optical plate (200) disposed on the light emitting device; a driving part (500) which is disposed on the base (610) and is electrically connected to the light source (400); and a housing (100) which receives the heat sink (600), the light source (400), the optical plate (200) and the driving part (500); wherein the lighting device further comprises a support (300) with a sloped surface forming an angle with the substrate (410), and a reflecting sheet (3000) disposed on the sloped surface of the support (300), wherein the reflecting sheet (3000) comprises a base sheet (3100) having a circular shape and a connecting sheet (3500) extending from one end of the base sheet, so as to close the reflecting sheet over itself.