Dome Window LED Radiator for Uniform Light Distribution
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Solution Overview
Problem
Existing light emitting devices suffer from non-uniform light distribution and inefficiencies in light path control, leading to inconsistent illumination patterns.
Innovation Solution
A light emitting apparatus with a substrate, light emitting structures, a dome-shaped window, and a reflector that controls light path and emission, featuring a convex lens design to condense light at a beam angle of 90 degrees or less, ensuring uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emitting structures are densely arranged (distance ≤ 500 micrometers), then light output intensity is improved, but light distribution uniformity deteriorates
Solution Approach 1:
The patent employs a dome-shaped window with a convex lens structure that has a curved surface. This curvature is specifically designed to refract and redirect light from densely arranged LED structures, transforming the light distribution pattern to achieve uniform illumination across the entire emitting area while maintaining high light output intensity.
Solution Approach 2:
The patent applies different refractive index characteristics to different regions of the dome-shaped window. The lens structure has varying thickness and curvature radius across its surface, with the center portion having different optical properties compared to the edge portions. This local variation in optical quality allows each region to control light from specific LED groups, ensuring uniform overall light distribution despite dense LED arrangement.
2Stability of the object's composition
If a dome-shaped window with convex lens is used to control light path, then light distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple optical functions into a single integrated dome-shaped window structure. This single component simultaneously serves as: (1) a protective cover for the LED array, (2) a refractive lens for light distribution control, and (3) a structural element for mechanical support. By merging these functions, the patent achieves uniform light distribution without proportionally increasing device complexity.
Solution Approach 2:
The dome-shaped window is designed to perform multiple functions: it protects the light emitting structures, controls and distributes light uniformly, and provides mechanical support for the entire LED array. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved light distribution uniformity.
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 apparatus achieves high reliability and uniform light emission by effectively controlling light path and reducing variations in light intensity, enhancing illumination consistency.
Implementation Method 1
A light emitting diode refers to a semiconductor device that emits light through recombination of electrons and holes
Implementation Method 2
The window is configured to control a traveling path of light emitted from the a plurality of light emitting structures
Implementation Method 3
The reflector is configured to support the window and reflect the light emitted from the plurality of light emitting structures
Data Source
AI summary
A light emitting apparatus includes a substrate, a plurality of light emitting structures, a window, and a reflector. The substrate has a luminous region and a non-luminous region. The plurality of light emitting structures is disposed on the luminous region of the substrate. The window has a dome shape and is disposed to cover the luminous region. The window is configured to control a traveling path of light emitted from the a plurality of light emitting structures. The reflector is configured to support the window and reflect the light emitted from the plurality of light emitting structures. The reflector has an opening that exposes the plurality of light emitting structures mounted on the substrate. A distance between two adjacent light emitting structures of the plurality of light emitting structures is 500 micrometers or less.