LED Light Extraction Lens Corner Geometry
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Solution Overview
Problem
Conventional light emitter devices struggle with inefficient light extraction from the corners of the submount, particularly as they are scaled down in size, leading to suboptimal brightness and optical performance.
Innovation Solution
The design incorporates a novel lens structure that extends to the edges of the submount, maximizing light extraction by covering more surface area and using a lens base that ascends from the submount edges, combined with optimized LED chip placement and phosphor usage to enhance light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lenses are used to improve light extraction, then light extraction is improved in central areas, but corner areas of the submount are not fully improved
Solution Approach 1:
The lens is extended into the corner regions of the submount by modifying its geometric footprint to include triangular corner sections. This dimensional extension ensures that light extraction improvement reaches the corner areas that were previously neglected by conventional circular or rectangular lens designs.
Solution Approach 2:
The lens design incorporates different regional characteristics: a central optical region for primary light extraction and extended corner regions specifically targeted at improving light extraction in previously underserved corner areas. Each region is optimized for its specific function while contributing to overall device performance.
2Volume of moving object
If device size is reduced to meet miniaturization demands, then device dimensions are smaller, but light extraction from corners becomes even more insufficient
Solution Approach 1:
By extending the lens into the corner dimensions of the submount, the effective light extraction area is maximized within the constrained device footprint. This allows smaller devices to maintain adequate brightness by utilizing otherwise wasted corner space for light extraction.
Solution Approach 2:
The lens geometry parameters are modified to include corner extensions, changing the optical path and extraction efficiency in corner regions. This parameter change enables improved light extraction from corners even as the overall device size is reduced for miniaturization applications.
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 approach significantly improves light extraction efficiency, maintaining or exceeding brightness levels even in smaller devices, thereby enhancing the overall performance of light emitter devices.
Implementation Method 1
Light emitting diodes (LEDs)
Implementation Method 2
light emitting diode (LED) device
Implementation Method 3
conventional lenses fail to extend near or proximate the edges of the submount
Data Source
AI summary
Light emitter devices with improved light extraction and related methods are disclosed. In one embodiment, the light emitter device can include a submount, at least one light emitting chip disposed over the submount, and a lens disposed over the light emitting chip. The lens can include a lens base that can have substantially the same geometry as a geometry of the submount.