LED Lamp End Caps for Uniform Brightness
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Solution Overview
Problem
Conventional LED lamps with terminals at the ends create non-light-emitting portions when connected in series, leading to uneven brightness and glare issues, making it difficult to achieve both increased light emission and uniform brightness.
Innovation Solution
The design features a tubular enclosure with LED modules arranged in a first direction, end caps that diffuse light while transmitting it, and a diffusion cover to ensure uniform light distribution, eliminating dark spots and glare by diffusing light from the modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If LED lamps are connected in series with terminals at the ends, then the lighting apparatus can be extended in length, but non-light-emitting portions appear at the joint portions creating dark spots
Solution Approach 1:
The invention changes the light emission direction from longitudinal (along the connection direction) to lateral (perpendicular to the connection direction). By making the end caps emit light in a direction perpendicular to the first direction (the longitudinal direction of LED modules), the joint portions between connected lamps become bright, eliminating dark spots and achieving uniform brightness across the entire extended lighting apparatus.
2Illumination intensity
If LED chips are arranged in a row to increase light emission amount, then the total light output increases, but sharp brightness distribution causes glare
Solution Approach 1:
The invention applies local quality by using a diffusion cover that selectively diffuses light in specific regions. The diffusion cover is positioned to cover the LED modules and has a light-emitting surface that faces sideways, creating a localized diffusion effect that softens the sharp brightness distribution from the row of LED chips while maintaining high total light output.
Solution Approach 2:
The diffusion cover acts as an intermediary between the LED chips and the surrounding environment. It receives light from the LED chips and redistributes it in a softer, more uniform manner, eliminating the direct line-of-sight glare while preserving the total light emission amount.
3Illumination intensity
If end caps are designed to emit light perpendicular to the longitudinal direction, then uniform brightness is achieved, but the structural complexity increases
Solution Approach 1:
The invention merges the end cap structure with the diffusion cover. The diffusion cover is integrated into the end cap assembly, where the end cap not only closes the tubular enclosure but also houses the diffusion cover that emits light perpendicular to the longitudinal direction. This integration reduces structural complexity by combining multiple functions into a single unified component.
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 solution provides a continuous light emission along the length of the LED lighting apparatus, enhancing its appearance and achieving uniform brightness by efficiently utilizing light from the modules, even when multiple lamps are connected.
Implementation Method 1
Each of the end caps is configured to diffuse light from the LED modules while transmitting the light
Implementation Method 2
a diffusion cover to ensure uniform light distribution, eliminating dark spots and glare by diffusing light from the modules
Data Source
AI summary
An LED lamp includes a plurality of LED modules arranged in direction x, a tubular enclosure for housing the LED modules that is open at ends spaced from each other in direction x, and end caps respectively closing the ends of the tubular enclosure in direction x. Each of the end caps is configured to diffuse light from the LED modules while transmitting the light, and includes an emission surface for emitting light in a direction z perpendicular to direction x. This arrangement ensures that the LED lamp has a good appearance even when it is made long.