LED Circuit Board Layout for Uniform Low-Profile Lighting
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Solution Overview
Problem
Low profile lighting fixtures using LED devices face challenges in minimizing shadowing effects from larger electronic components, which interfere with light output and result in non-uniform illumination.
Innovation Solution
The electronic components for power conditioning, including a driver circuit and a flicker reducing circuit, are arranged on a separate portion of the circuit board radially apart from the LED devices, reducing interference and shadowing effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electronic components are placed on the same circuit board as LED devices, then device complexity is reduced, but shadowing effects increase and light output uniformity deteriorates
Solution Approach 1:
The circuit board is divided into distinct functional zones: a first portion dedicated to LED devices and a second portion dedicated to electronic components. This spatial segmentation prevents electronic components from casting shadows over LED light output, resolving the contradiction between integrated design and illumination uniformity.
Solution Approach 2:
Electronic components are positioned radially apart from the center point of the circuit board, utilizing the radial dimension to separate component locations. This dimensional arrangement ensures that larger electronic components do not interfere with the light emission path while maintaining electrical connectivity through the circuit board traces.
2Ease of manufacture
If larger electronic components are placed near LED devices, then manufacturing is simplified, but shadowing effects increase and interfere with light output
Solution Approach 1:
Different regions of the circuit board are assigned different functional qualities: the first portion (center region) is optimized for light emission with LED devices, while the second portion (peripheral region) is optimized for electrical functions with electronic components. This local differentiation eliminates shadowing in the light output region while maintaining manufacturing simplicity through standardized board design.
3Length of stationary object
If a single circuit board is used for both LED devices and electronic components, then fixture depth is reduced, but component interference with light emission increases
Solution Approach 1:
Electronic components are extracted from the central light-emitting region and placed in a separate second portion of the circuit board radially apart from the center point. This extraction eliminates their harmful shadowing effects on light emission while maintaining the benefits of a single-board integrated design for reduced fixture depth.
Data Source
AI summary
Light emitting device (LED) circuit board layouts for low profile lighting fixtures are provided. In some embodiments, the lighting fixture can include a fixture housing. The lighting fixture can include one or more LED devices disposed on a circuit board. The lighting fixture can include one or more electronic components associated with at least one of a driver circuit or a filter circuit (e.g., as part of a flicker reducing circuit) disposed on the circuit board. The one or more LED devices are disposed on a first portion of the circuit board and the electronic components are disposed on a second portion of the circuit board. The second portion of the circuit board can be spaced radially apart from a center point of the circuit board relative to the first portion.